Amazon AWS Certified Solutions Architect Associate SAA-C03 Storage Selection Performance and Hybrid Access Practice Test

 

Topic 11 covers storage selection performance and hybrid access for the AWS Certified Solutions Architect – Associate certification. These original practice questions apply the verified SAA-C03 objectives to practical decisions and troubleshooting. Select one answer unless a fixed number is requested. For broader preparation, visit the AWS Certified Solutions Architect Associate SAA-C03 Exam Dumps page. Each option includes an explanation of the relevant behavior and scenario constraints.

Question 1

A media application stores billions of independent files that are accessed through HTTP APIs and do not require a mounted filesystem. Which storage service best matches the access model?

1. Use Amazon EBS.
2. Use Amazon S3.
3. Use Amazon EFS.
4. Use Amazon FSx for Windows File Server.
5. Use Amazon FSx for Lustre.

Correct Answer: B

 

Correct Answer

Answer B is correct because S3 is durable object storage accessed through object APIs rather than a block device or traditional mounted filesystem. This directly meets the decisive requirement: object storage.

Incorrect Answers

Answer A is incorrect because EBS provides persistent block volumes attached to EC2 instances. It may be useful elsewhere, but it does not meet the decisive requirement here: object storage.

Answer C is incorrect because EFS provides a managed elastic NFS filesystem for concurrent Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: object storage.

Answer D is incorrect because FSx for Windows provides managed SMB filesystems with Windows-compatible features and Active Directory integration. It may be useful elsewhere, but it does not meet the decisive requirement here: object storage.

Answer E is incorrect because FSx for Lustre provides a managed high-performance parallel filesystem suited to compute-intensive workloads and S3 integration. It may be useful elsewhere, but it does not meet the decisive requirement here: object storage.

 

Question 2

A single EC2 database server requires low-latency persistent block storage that appears as a device to the guest OS. Which service should be used?

3. Use Amazon S3.
4. Use Amazon FSx for Lustre.
5. Use Amazon FSx for Windows File Server.
6. Use Amazon EFS.
7. Use Amazon EBS.

Correct Answer: E

 

Correct Answer

Answer E is correct because EBS provides persistent block volumes attached to EC2 instances. This directly meets the decisive requirement: persistent block storage.

Incorrect Answers

Answer A is incorrect because S3 is durable object storage accessed through object APIs rather than a block device or traditional mounted filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: persistent block storage.

Answer B is incorrect because FSx for Lustre provides a managed high-performance parallel filesystem suited to compute-intensive workloads and S3 integration. It may be useful elsewhere, but it does not meet the decisive requirement here: persistent block storage.

Answer C is incorrect because FSx for Windows provides managed SMB filesystems with Windows-compatible features and Active Directory integration. It may be useful elsewhere, but it does not meet the decisive requirement here: persistent block storage.

Answer D is incorrect because EFS provides a managed elastic NFS filesystem for concurrent Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: persistent block storage.

 

Question 3

A Linux web farm needs a shared POSIX filesystem mounted concurrently by hundreds of instances. Which service is the best fit?

1. Use Amazon EBS.
2. Use Amazon FSx for Windows File Server.
3. Use Amazon S3.
4. Use Amazon FSx for Lustre.
5. Use Amazon EFS.

Correct Answer: E

 

Correct Answer

Answer E is correct because EFS provides a managed elastic NFS filesystem for concurrent Linux clients. This directly meets the decisive requirement: NFS-compatible managed file service.

Incorrect Answers

Answer A is incorrect because EBS provides persistent block volumes attached to EC2 instances. It may be useful elsewhere, but it does not meet the decisive requirement here: NFS-compatible managed file service.

Answer B is incorrect because FSx for Windows provides managed SMB filesystems with Windows-compatible features and Active Directory integration. It may be useful elsewhere, but it does not meet the decisive requirement here: NFS-compatible managed file service.

Answer C is incorrect because S3 is durable object storage accessed through object APIs rather than a block device or traditional mounted filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: NFS-compatible managed file service.

Answer D is incorrect because FSx for Lustre provides a managed high-performance parallel filesystem suited to compute-intensive workloads and S3 integration. It may be useful elsewhere, but it does not meet the decisive requirement here: NFS-compatible managed file service.

 

Question 4

A Windows application requires managed SMB shares, Windows ACLs, and Active Directory integration. Which storage service is appropriate?

1. Use Amazon FSx for Windows File Server.
2. Use Amazon S3.
3. Use Amazon EFS.
4. Use Amazon EBS.
5. Use Amazon FSx for Lustre.

Correct Answer: A

 

Correct Answer

Answer A is correct because FSx for Windows provides managed SMB filesystems with Windows-compatible features and Active Directory integration. This directly meets the decisive requirement: FSx for Windows File Server.

Incorrect Answers

Answer B is incorrect because S3 is durable object storage accessed through object APIs rather than a block device or traditional mounted filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows File Server.

Answer C is incorrect because EFS provides a managed elastic NFS filesystem for concurrent Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows File Server.

Answer D is incorrect because EBS provides persistent block volumes attached to EC2 instances. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows File Server.

Answer E is incorrect because FSx for Lustre provides a managed high-performance parallel filesystem suited to compute-intensive workloads and S3 integration. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows File Server.

 

Question 5

A high-performance analytics workload needs a parallel filesystem integrated with S3 and optimized for high-throughput processing. Which service best fits?

1. Use Amazon FSx for Windows File Server.
2. Use Amazon EBS.
3. Use Amazon FSx for Lustre.
4. Use Amazon S3.
5. Use Amazon EFS.

Correct Answer: C

 

Correct Answer

Answer C is correct because FSx for Lustre provides a managed high-performance parallel filesystem suited to compute-intensive workloads and S3 integration. This directly meets the decisive requirement: FSx for Lustre.

Incorrect Answers

Answer A is incorrect because FSx for Windows provides managed SMB filesystems with Windows-compatible features and Active Directory integration. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Lustre.

Answer B is incorrect because EBS provides persistent block volumes attached to EC2 instances. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Lustre.

Answer D is incorrect because S3 is durable object storage accessed through object APIs rather than a block device or traditional mounted filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Lustre.

Answer E is incorrect because EFS provides a managed elastic NFS filesystem for concurrent Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Lustre.

 

Question 6

A transactional database performs many small random reads and writes and needs predictable high IOPS beyond general-purpose requirements. Which EBS family best matches?

1. Use an st1 Throughput Optimized HDD volume.
2. Select an EC2 instance with sufficient EBS-optimized bandwidth.
3. Increase gp3 provisioned IOPS independently of volume size.
4. Use EBS Multi-Attach on a supported io1/io2 configuration and only with an application designed for shared block access.
5. Use an io2 Provisioned IOPS SSD volume.

Correct Answer: E

 

Correct Answer

Answer E is correct because Provisioned IOPS SSD is designed for I/O-intensive transactional workloads that need sustained predictable IOPS. This directly meets the decisive requirement: Provisioned IOPS SSD.

Incorrect Answers

Answer A is incorrect because st1 is optimized for large sequential workloads where throughput is the dominant characteristic. It may be useful elsewhere, but it does not meet the decisive requirement here: Provisioned IOPS SSD.

Answer B is incorrect because The instance EBS bandwidth ceiling can limit throughput even when the volume itself is provisioned for more. It may be useful elsewhere, but it does not meet the decisive requirement here: Provisioned IOPS SSD.

Answer C is incorrect because gp3 decouples baseline storage capacity from configurable IOPS and throughput within service limits. It may be useful elsewhere, but it does not meet the decisive requirement here: Provisioned IOPS SSD.

Answer D is incorrect because Multi-Attach can expose one supported EBS volume to multiple instances, but the application must coordinate concurrent block access safely. It may be useful elsewhere, but it does not meet the decisive requirement here: Provisioned IOPS SSD.

 

Question 7

A log-processing node performs large sequential reads and writes where throughput matters more than individual IOPS. Which EBS type is appropriate?

1. Use EBS Multi-Attach on a supported io1/io2 configuration and only with an application designed for shared block access.
2. Use an io2 Provisioned IOPS SSD volume.
3. Use an st1 Throughput Optimized HDD volume.
4. Select an EC2 instance with sufficient EBS-optimized bandwidth.
5. Increase gp3 provisioned IOPS independently of volume size.

Correct Answer: C

 

Correct Answer

Answer C is correct because st1 is optimized for large sequential workloads where throughput is the dominant characteristic. This directly meets the decisive requirement: Throughput Optimized HDD.

Incorrect Answers

Answer A is incorrect because Multi-Attach can expose one supported EBS volume to multiple instances, but the application must coordinate concurrent block access safely. It may be useful elsewhere, but it does not meet the decisive requirement here: Throughput Optimized HDD.

Answer B is incorrect because Provisioned IOPS SSD is designed for I/O-intensive transactional workloads that need sustained predictable IOPS. It may be useful elsewhere, but it does not meet the decisive requirement here: Throughput Optimized HDD.

Answer D is incorrect because The instance EBS bandwidth ceiling can limit throughput even when the volume itself is provisioned for more. It may be useful elsewhere, but it does not meet the decisive requirement here: Throughput Optimized HDD.

Answer E is incorrect because gp3 decouples baseline storage capacity from configurable IOPS and throughput within service limits. It may be useful elsewhere, but it does not meet the decisive requirement here: Throughput Optimized HDD.

 

Question 8

A gp3 volume has unused capacity but the application needs more IOPS without increasing storage size. Which capability should be used?

1. Increase gp3 provisioned IOPS independently of volume size.
2. Use an st1 Throughput Optimized HDD volume.
3. Select an EC2 instance with sufficient EBS-optimized bandwidth.
4. Use an io2 Provisioned IOPS SSD volume.
5. Use EBS Multi-Attach on a supported io1/io2 configuration and only with an application designed for shared block access.

Correct Answer: A

 

Correct Answer

Answer A is correct because gp3 decouples baseline storage capacity from configurable IOPS and throughput within service limits. This directly meets the decisive requirement: provision additional gp3 IOPS.

Incorrect Answers

Answer B is incorrect because st1 is optimized for large sequential workloads where throughput is the dominant characteristic. It may be useful elsewhere, but it does not meet the decisive requirement here: provision additional gp3 IOPS.

Answer C is incorrect because The instance EBS bandwidth ceiling can limit throughput even when the volume itself is provisioned for more. It may be useful elsewhere, but it does not meet the decisive requirement here: provision additional gp3 IOPS.

Answer D is incorrect because Provisioned IOPS SSD is designed for I/O-intensive transactional workloads that need sustained predictable IOPS. It may be useful elsewhere, but it does not meet the decisive requirement here: provision additional gp3 IOPS.

Answer E is incorrect because Multi-Attach can expose one supported EBS volume to multiple instances, but the application must coordinate concurrent block access safely. It may be useful elsewhere, but it does not meet the decisive requirement here: provision additional gp3 IOPS.

 

Question 9

An EBS volume is configured for high throughput, but the EC2 instance type has a lower EBS bandwidth ceiling. Which change addresses the bottleneck?

1. Use an st1 Throughput Optimized HDD volume.
2. Select an EC2 instance with sufficient EBS-optimized bandwidth.
3. Increase gp3 provisioned IOPS independently of volume size.
4. Use an io2 Provisioned IOPS SSD volume.
5. Use EBS Multi-Attach on a supported io1/io2 configuration and only with an application designed for shared block access.

Correct Answer: B

 

Correct Answer

Answer B is correct because The instance EBS bandwidth ceiling can limit throughput even when the volume itself is provisioned for more. This directly meets the decisive requirement: choose instance with sufficient EBS bandwidth.

Incorrect Answers

Answer A is incorrect because st1 is optimized for large sequential workloads where throughput is the dominant characteristic. It may be useful elsewhere, but it does not meet the decisive requirement here: choose instance with sufficient EBS bandwidth.

Answer C is incorrect because gp3 decouples baseline storage capacity from configurable IOPS and throughput within service limits. It may be useful elsewhere, but it does not meet the decisive requirement here: choose instance with sufficient EBS bandwidth.

Answer D is incorrect because Provisioned IOPS SSD is designed for I/O-intensive transactional workloads that need sustained predictable IOPS. It may be useful elsewhere, but it does not meet the decisive requirement here: choose instance with sufficient EBS bandwidth.

Answer E is incorrect because Multi-Attach can expose one supported EBS volume to multiple instances, but the application must coordinate concurrent block access safely. It may be useful elsewhere, but it does not meet the decisive requirement here: choose instance with sufficient EBS bandwidth.

 

Question 10

A database uses io2 and needs the same block volume attached to multiple Nitro-based instances for a clustered application that supports shared-block coordination. Which feature is relevant?

1. Use an io2 Provisioned IOPS SSD volume.
2. Use EBS Multi-Attach on a supported io1/io2 configuration and only with an application designed for shared block access.
3. Use an st1 Throughput Optimized HDD volume.
4. Increase gp3 provisioned IOPS independently of volume size.
5. Select an EC2 instance with sufficient EBS-optimized bandwidth.

Correct Answer: B

 

Correct Answer

Answer B is correct because Multi-Attach can expose one supported EBS volume to multiple instances, but the application must coordinate concurrent block access safely. This directly meets the decisive requirement: EBS Multi-Attach where supported.

Incorrect Answers

Answer A is incorrect because Provisioned IOPS SSD is designed for I/O-intensive transactional workloads that need sustained predictable IOPS. It may be useful elsewhere, but it does not meet the decisive requirement here: EBS Multi-Attach where supported.

Answer C is incorrect because st1 is optimized for large sequential workloads where throughput is the dominant characteristic. It may be useful elsewhere, but it does not meet the decisive requirement here: EBS Multi-Attach where supported.

Answer D is incorrect because gp3 decouples baseline storage capacity from configurable IOPS and throughput within service limits. It may be useful elsewhere, but it does not meet the decisive requirement here: EBS Multi-Attach where supported.

Answer E is incorrect because The instance EBS bandwidth ceiling can limit throughput even when the volume itself is provisioned for more. It may be useful elsewhere, but it does not meet the decisive requirement here: EBS Multi-Attach where supported.

 

Question 11

An EFS workload has unpredictable throughput that rises and falls sharply, and the team does not want to provision a fixed throughput value. Which throughput mode best fits?

1. Use EFS Elastic throughput.
2. Create EFS mount targets in the required AZs and use the normal mount mechanism so clients reach an AZ-local mount target.
3. Use Amazon FSx for Windows File Server.
4. Analyze the metadata and IOPS pattern rather than only increasing nominal throughput.
5. Use EFS General Purpose performance mode.

Correct Answer: A

 

Correct Answer

Answer A is correct because Elastic throughput automatically scales available throughput with workload activity and avoids a fixed provisioned throughput target. This directly meets the decisive requirement: Elastic throughput.

Incorrect Answers

Answer B is incorrect because AZ-local mount targets avoid unnecessary cross-AZ network paths and provide resilient access to the regional filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: Elastic throughput.

Answer C is incorrect because FSx for Windows provides managed SMB semantics for Windows applications. It may be useful elsewhere, but it does not meet the decisive requirement here: Elastic throughput.

Answer D is incorrect because Small-file and metadata-heavy workloads can be constrained by operation rates even when aggregate bandwidth is low. It may be useful elsewhere, but it does not meet the decisive requirement here: Elastic throughput.

Answer E is incorrect because General Purpose mode provides the lowest per-operation latency and is recommended for most EFS workloads. It may be useful elsewhere, but it does not meet the decisive requirement here: Elastic throughput.

 

Question 12

An EFS workload is latency-sensitive and does not require the older highly parallel Max I/O behavior. Which performance mode should be preferred?

1. Analyze the metadata and IOPS pattern rather than only increasing nominal throughput.
2. Use EFS Elastic throughput.
3. Create EFS mount targets in the required AZs and use the normal mount mechanism so clients reach an AZ-local mount target.
4. Use EFS General Purpose performance mode.
5. Use Amazon FSx for Windows File Server.

Correct Answer: D

 

Correct Answer

Answer D is correct because General Purpose mode provides the lowest per-operation latency and is recommended for most EFS workloads. This directly meets the decisive requirement: General Purpose mode.

Incorrect Answers

Answer A is incorrect because Small-file and metadata-heavy workloads can be constrained by operation rates even when aggregate bandwidth is low. It may be useful elsewhere, but it does not meet the decisive requirement here: General Purpose mode.

Answer B is incorrect because Elastic throughput automatically scales available throughput with workload activity and avoids a fixed provisioned throughput target. It may be useful elsewhere, but it does not meet the decisive requirement here: General Purpose mode.

Answer C is incorrect because AZ-local mount targets avoid unnecessary cross-AZ network paths and provide resilient access to the regional filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: General Purpose mode.

Answer E is incorrect because FSx for Windows provides managed SMB semantics for Windows applications. It may be useful elsewhere, but it does not meet the decisive requirement here: General Purpose mode.

 

Question 13

A workload creates millions of very small files and is limited by metadata operations rather than raw MB/s. What should the architect investigate first?

1. Use Amazon FSx for Windows File Server.
2. Analyze the metadata and IOPS pattern rather than only increasing nominal throughput.
3. Use EFS Elastic throughput.
4. Use EFS General Purpose performance mode.
5. Create EFS mount targets in the required AZs and use the normal mount mechanism so clients reach an AZ-local mount target.

Correct Answer: B

 

Correct Answer

Answer B is correct because Small-file and metadata-heavy workloads can be constrained by operation rates even when aggregate bandwidth is low. This directly meets the decisive requirement: filesystem IOPS and metadata pattern.

Incorrect Answers

Answer A is incorrect because FSx for Windows provides managed SMB semantics for Windows applications. It may be useful elsewhere, but it does not meet the decisive requirement here: filesystem IOPS and metadata pattern.

Answer C is incorrect because Elastic throughput automatically scales available throughput with workload activity and avoids a fixed provisioned throughput target. It may be useful elsewhere, but it does not meet the decisive requirement here: filesystem IOPS and metadata pattern.

Answer D is incorrect because General Purpose mode provides the lowest per-operation latency and is recommended for most EFS workloads. It may be useful elsewhere, but it does not meet the decisive requirement here: filesystem IOPS and metadata pattern.

Answer E is incorrect because AZ-local mount targets avoid unnecessary cross-AZ network paths and provide resilient access to the regional filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: filesystem IOPS and metadata pattern.

 

Question 14

A Windows application requires SMB rather than NFS. Which shared-file family should be selected instead of EFS?

1. Analyze the metadata and IOPS pattern rather than only increasing nominal throughput.
2. Create EFS mount targets in the required AZs and use the normal mount mechanism so clients reach an AZ-local mount target.
3. Use EFS General Purpose performance mode.
4. Use EFS Elastic throughput.
5. Use Amazon FSx for Windows File Server.

Correct Answer: E

 

Correct Answer

Answer E is correct because FSx for Windows provides managed SMB semantics for Windows applications. This directly meets the decisive requirement: FSx for Windows.

Incorrect Answers

Answer A is incorrect because Small-file and metadata-heavy workloads can be constrained by operation rates even when aggregate bandwidth is low. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows.

Answer B is incorrect because AZ-local mount targets avoid unnecessary cross-AZ network paths and provide resilient access to the regional filesystem. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows.

Answer C is incorrect because General Purpose mode provides the lowest per-operation latency and is recommended for most EFS workloads. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows.

Answer D is incorrect because Elastic throughput automatically scales available throughput with workload activity and avoids a fixed provisioned throughput target. It may be useful elsewhere, but it does not meet the decisive requirement here: FSx for Windows.

 

Question 15

EC2 clients in three AZs mount an EFS filesystem. Which networking practice avoids unnecessary cross-AZ pathing for file access?

1. Create EFS mount targets in the required AZs and use the normal mount mechanism so clients reach an AZ-local mount target.
2. Analyze the metadata and IOPS pattern rather than only increasing nominal throughput.
3. Use Amazon FSx for Windows File Server.
4. Use EFS Elastic throughput.
5. Use EFS General Purpose performance mode.

Correct Answer: A

 

Correct Answer

Answer A is correct because AZ-local mount targets avoid unnecessary cross-AZ network paths and provide resilient access to the regional filesystem. This directly meets the decisive requirement: use mount targets/local DNS path in each AZ.

Incorrect Answers

Answer B is incorrect because Small-file and metadata-heavy workloads can be constrained by operation rates even when aggregate bandwidth is low. It may be useful elsewhere, but it does not meet the decisive requirement here: use mount targets/local DNS path in each AZ.

Answer C is incorrect because FSx for Windows provides managed SMB semantics for Windows applications. It may be useful elsewhere, but it does not meet the decisive requirement here: use mount targets/local DNS path in each AZ.

Answer D is incorrect because Elastic throughput automatically scales available throughput with workload activity and avoids a fixed provisioned throughput target. It may be useful elsewhere, but it does not meet the decisive requirement here: use mount targets/local DNS path in each AZ.

Answer E is incorrect because General Purpose mode provides the lowest per-operation latency and is recommended for most EFS workloads. It may be useful elsewhere, but it does not meet the decisive requirement here: use mount targets/local DNS path in each AZ.

 

Question 16

A client must upload a 200 GB object over a fast connection and recover efficiently from partial failures. Which S3 upload method should be used?

1. Issue parallel S3 requests with sufficient client concurrency.
2. Use Amazon CloudFront in front of the S3 origin for cacheable content.
3. Use S3 multipart upload.
4. Use S3 Transfer Acceleration when measurements show benefit for long-distance transfers.
5. Use ranged GET requests so independent byte ranges can be retrieved in parallel.

Correct Answer: C

 

Correct Answer

Answer C is correct because Multipart upload transfers independent parts and lets failed parts be retried without restarting the entire large object. This directly meets the decisive requirement: multipart upload.

Incorrect Answers

Answer A is incorrect because S3 performance scales with parallel request patterns and does not require serial access to unrelated objects. It may be useful elsewhere, but it does not meet the decisive requirement here: multipart upload.

Answer B is incorrect because CloudFront serves cached copies from edge locations and reduces repeated origin fetches for global readers. It may be useful elsewhere, but it does not meet the decisive requirement here: multipart upload.

Answer D is incorrect because Transfer Acceleration uses the AWS edge network to improve suitable long-distance transfers to S3. It may be useful elsewhere, but it does not meet the decisive requirement here: multipart upload.

Answer E is incorrect because Byte-range retrieval can split processing of a large object across parallel workers. It may be useful elsewhere, but it does not meet the decisive requirement here: multipart upload.

 

Question 17

A compute job can process independent sections of a large S3 object in parallel. Which request pattern supports this?

1. Use Amazon CloudFront in front of the S3 origin for cacheable content.
2. Use S3 multipart upload.
3. Use S3 Transfer Acceleration when measurements show benefit for long-distance transfers.
4. Use ranged GET requests so independent byte ranges can be retrieved in parallel.
5. Issue parallel S3 requests with sufficient client concurrency.

Correct Answer: D

 

Correct Answer

Answer D is correct because Byte-range retrieval can split processing of a large object across parallel workers. This directly meets the decisive requirement: byte-range GET requests.

Incorrect Answers

Answer A is incorrect because CloudFront serves cached copies from edge locations and reduces repeated origin fetches for global readers. It may be useful elsewhere, but it does not meet the decisive requirement here: byte-range GET requests.

Answer B is incorrect because Multipart upload transfers independent parts and lets failed parts be retried without restarting the entire large object. It may be useful elsewhere, but it does not meet the decisive requirement here: byte-range GET requests.

Answer C is incorrect because Transfer Acceleration uses the AWS edge network to improve suitable long-distance transfers to S3. It may be useful elsewhere, but it does not meet the decisive requirement here: byte-range GET requests.

Answer E is incorrect because S3 performance scales with parallel request patterns and does not require serial access to unrelated objects. It may be useful elsewhere, but it does not meet the decisive requirement here: byte-range GET requests.

 

Question 18

A workload makes extremely high request rates to many S3 keys. Which application pattern helps maximize throughput?

1. Use Amazon CloudFront in front of the S3 origin for cacheable content.
2. Use ranged GET requests so independent byte ranges can be retrieved in parallel.
3. Use S3 multipart upload.
4. Issue parallel S3 requests with sufficient client concurrency.
5. Use S3 Transfer Acceleration when measurements show benefit for long-distance transfers.

Correct Answer: D

 

Correct Answer

Answer D is correct because S3 performance scales with parallel request patterns and does not require serial access to unrelated objects. This directly meets the decisive requirement: parallelize requests across connections.

Incorrect Answers

Answer A is incorrect because CloudFront serves cached copies from edge locations and reduces repeated origin fetches for global readers. It may be useful elsewhere, but it does not meet the decisive requirement here: parallelize requests across connections.

Answer B is incorrect because Byte-range retrieval can split processing of a large object across parallel workers. It may be useful elsewhere, but it does not meet the decisive requirement here: parallelize requests across connections.

Answer C is incorrect because Multipart upload transfers independent parts and lets failed parts be retried without restarting the entire large object. It may be useful elsewhere, but it does not meet the decisive requirement here: parallelize requests across connections.

Answer E is incorrect because Transfer Acceleration uses the AWS edge network to improve suitable long-distance transfers to S3. It may be useful elsewhere, but it does not meet the decisive requirement here: parallelize requests across connections.

 

Question 19

Global users repeatedly download the same public objects and origin request latency is visible. Which service can cache those objects near users?

1. Use Amazon CloudFront in front of the S3 origin for cacheable content.
2. Use S3 multipart upload.
3. Use S3 Transfer Acceleration when measurements show benefit for long-distance transfers.
4. Use ranged GET requests so independent byte ranges can be retrieved in parallel.
5. Issue parallel S3 requests with sufficient client concurrency.

Correct Answer: A

 

Correct Answer

Answer A is correct because CloudFront serves cached copies from edge locations and reduces repeated origin fetches for global readers. This directly meets the decisive requirement: CloudFront caching.

Incorrect Answers

Answer B is incorrect because Multipart upload transfers independent parts and lets failed parts be retried without restarting the entire large object. It may be useful elsewhere, but it does not meet the decisive requirement here: CloudFront caching.

Answer C is incorrect because Transfer Acceleration uses the AWS edge network to improve suitable long-distance transfers to S3. It may be useful elsewhere, but it does not meet the decisive requirement here: CloudFront caching.

Answer D is incorrect because Byte-range retrieval can split processing of a large object across parallel workers. It may be useful elsewhere, but it does not meet the decisive requirement here: CloudFront caching.

Answer E is incorrect because S3 performance scales with parallel request patterns and does not require serial access to unrelated objects. It may be useful elsewhere, but it does not meet the decisive requirement here: CloudFront caching.

 

Question 20

A client uploads objects from geographically distant locations to one bucket and transfer path latency is a major concern. Which S3 feature can improve long-distance transfer performance where appropriate?

1. Use S3 Transfer Acceleration when measurements show benefit for long-distance transfers.
2. Issue parallel S3 requests with sufficient client concurrency.
3. Use S3 multipart upload.
4. Use ranged GET requests so independent byte ranges can be retrieved in parallel.
5. Use Amazon CloudFront in front of the S3 origin for cacheable content.

Correct Answer: A

 

Correct Answer

Answer A is correct because Transfer Acceleration uses the AWS edge network to improve suitable long-distance transfers to S3. This directly meets the decisive requirement: S3 Transfer Acceleration.

Incorrect Answers

Answer B is incorrect because S3 performance scales with parallel request patterns and does not require serial access to unrelated objects. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 Transfer Acceleration.

Answer C is incorrect because Multipart upload transfers independent parts and lets failed parts be retried without restarting the entire large object. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 Transfer Acceleration.

Answer D is incorrect because Byte-range retrieval can split processing of a large object across parallel workers. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 Transfer Acceleration.

Answer E is incorrect because CloudFront serves cached copies from edge locations and reduces repeated origin fetches for global readers. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 Transfer Acceleration.

 

Question 21

An on-premises office requires low-latency access to frequently used files through NFS while the durable object copy resides in S3. Which service pattern is appropriate?

1. Use AWS Storage Gateway Tape Gateway.
2. Confirm the customer is eligible to use Snowball and that the migration completes before the announced December 31, 2026 end of commercial-Region support.
3. Use AWS Storage Gateway Volume Gateway.
4. Use Amazon S3 File Gateway with local cache.
5. Use AWS DataSync.

Correct Answer: D

 

Correct Answer

Answer D is correct because S3 File Gateway exposes file protocols on premises while storing durable objects in Amazon S3 and caching active data locally. This directly meets the decisive requirement: S3-backed file gateway.

Incorrect Answers

Answer A is incorrect because Tape Gateway presents virtual tape interfaces to existing backup software while storing virtual tapes in AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: S3-backed file gateway.

Answer B is incorrect because Snowball is no longer available to new customers and AWS has announced commercial-Region support ending December 31, 2026, so lifecycle eligibility is a decisive planning constraint. It may be useful elsewhere, but it does not meet the decisive requirement here: S3-backed file gateway.

Answer C is incorrect because Volume Gateway provides block storage interfaces on premises with cloud-backed storage behavior. It may be useful elsewhere, but it does not meet the decisive requirement here: S3-backed file gateway.

Answer E is incorrect because DataSync is a managed online data-transfer service for moving and synchronizing files and objects between on-premises storage and AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: S3-backed file gateway.

 

Question 22

A company must repeatedly synchronize a large on-premises filesystem to S3 over an available network connection with managed scheduling and integrity checks. Which service should be used?

1. Confirm the customer is eligible to use Snowball and that the migration completes before the announced December 31, 2026 end of commercial-Region support.
2. Use AWS DataSync.
3. Use AWS Storage Gateway Tape Gateway.
4. Use AWS Storage Gateway Volume Gateway.
5. Use Amazon S3 File Gateway with local cache.

Correct Answer: B

 

Correct Answer

Answer B is correct because DataSync is a managed online data-transfer service for moving and synchronizing files and objects between on-premises storage and AWS. This directly meets the decisive requirement: DataSync.

Incorrect Answers

Answer A is incorrect because Snowball is no longer available to new customers and AWS has announced commercial-Region support ending December 31, 2026, so lifecycle eligibility is a decisive planning constraint. It may be useful elsewhere, but it does not meet the decisive requirement here: DataSync.

Answer C is incorrect because Tape Gateway presents virtual tape interfaces to existing backup software while storing virtual tapes in AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: DataSync.

Answer D is incorrect because Volume Gateway provides block storage interfaces on premises with cloud-backed storage behavior. It may be useful elsewhere, but it does not meet the decisive requirement here: DataSync.

Answer E is incorrect because S3 File Gateway exposes file protocols on premises while storing durable objects in Amazon S3 and caching active data locally. It may be useful elsewhere, but it does not meet the decisive requirement here: DataSync.

 

Question 23

A legacy application requires block volumes on premises while primary data is asynchronously backed by AWS storage. Which hybrid-storage family best matches?

1. Confirm the customer is eligible to use Snowball and that the migration completes before the announced December 31, 2026 end of commercial-Region support.
2. Use AWS Storage Gateway Volume Gateway.
3. Use AWS Storage Gateway Tape Gateway.
4. Use Amazon S3 File Gateway with local cache.
5. Use AWS DataSync.

Correct Answer: B

 

Correct Answer

Answer B is correct because Volume Gateway provides block storage interfaces on premises with cloud-backed storage behavior. This directly meets the decisive requirement: Storage Gateway Volume Gateway.

Incorrect Answers

Answer A is incorrect because Snowball is no longer available to new customers and AWS has announced commercial-Region support ending December 31, 2026, so lifecycle eligibility is a decisive planning constraint. It may be useful elsewhere, but it does not meet the decisive requirement here: Storage Gateway Volume Gateway.

Answer C is incorrect because Tape Gateway presents virtual tape interfaces to existing backup software while storing virtual tapes in AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: Storage Gateway Volume Gateway.

Answer D is incorrect because S3 File Gateway exposes file protocols on premises while storing durable objects in Amazon S3 and caching active data locally. It may be useful elsewhere, but it does not meet the decisive requirement here: Storage Gateway Volume Gateway.

Answer E is incorrect because DataSync is a managed online data-transfer service for moving and synchronizing files and objects between on-premises storage and AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: Storage Gateway Volume Gateway.

 

Question 24

A backup system writes virtual tape and the company wants to move tape workflows to AWS without changing the backup application protocol. Which gateway fits?

1. Use AWS Storage Gateway Tape Gateway.
2. Use AWS DataSync.
3. Use AWS Storage Gateway Volume Gateway.
4. Confirm the customer is eligible to use Snowball and that the migration completes before the announced December 31, 2026 end of commercial-Region support.
5. Use Amazon S3 File Gateway with local cache.

Correct Answer: A

 

Correct Answer

Answer A is correct because Tape Gateway presents virtual tape interfaces to existing backup software while storing virtual tapes in AWS. This directly meets the decisive requirement: Tape Gateway.

Incorrect Answers

Answer B is incorrect because DataSync is a managed online data-transfer service for moving and synchronizing files and objects between on-premises storage and AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: Tape Gateway.

Answer C is incorrect because Volume Gateway provides block storage interfaces on premises with cloud-backed storage behavior. It may be useful elsewhere, but it does not meet the decisive requirement here: Tape Gateway.

Answer D is incorrect because Snowball is no longer available to new customers and AWS has announced commercial-Region support ending December 31, 2026, so lifecycle eligibility is a decisive planning constraint. It may be useful elsewhere, but it does not meet the decisive requirement here: Tape Gateway.

Answer E is incorrect because S3 File Gateway exposes file protocols on premises while storing durable objects in Amazon S3 and caching active data locally. It may be useful elsewhere, but it does not meet the decisive requirement here: Tape Gateway.

 

Question 25

An existing AWS Snowball customer has a disconnected site with hundreds of TB to transfer and no practical network path. What current service-lifecycle check is essential before planning the transfer?

1. Confirm the customer is eligible to use Snowball and that the migration completes before the announced December 31, 2026 end of commercial-Region support.
2. Use AWS Storage Gateway Volume Gateway.
3. Use AWS Storage Gateway Tape Gateway.
4. Use AWS DataSync.
5. Use Amazon S3 File Gateway with local cache.

Correct Answer: A

 

Correct Answer

Answer A is correct because Snowball is no longer available to new customers and AWS has announced commercial-Region support ending December 31, 2026, so lifecycle eligibility is a decisive planning constraint. This directly meets the decisive requirement: verify Snowball eligibility and 2026 end-of-support timing.

Incorrect Answers

Answer B is incorrect because Volume Gateway provides block storage interfaces on premises with cloud-backed storage behavior. It may be useful elsewhere, but it does not meet the decisive requirement here: verify Snowball eligibility and 2026 end-of-support timing.

Answer C is incorrect because Tape Gateway presents virtual tape interfaces to existing backup software while storing virtual tapes in AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: verify Snowball eligibility and 2026 end-of-support timing.

Answer D is incorrect because DataSync is a managed online data-transfer service for moving and synchronizing files and objects between on-premises storage and AWS. It may be useful elsewhere, but it does not meet the decisive requirement here: verify Snowball eligibility and 2026 end-of-support timing.

Answer E is incorrect because S3 File Gateway exposes file protocols on premises while storing durable objects in Amazon S3 and caching active data locally. It may be useful elsewhere, but it does not meet the decisive requirement here: verify Snowball eligibility and 2026 end-of-support timing.

 

Question 26

An archive grows by 20 TB per month and individual objects are immutable. Which storage model scales capacity without provisioning volumes?

1. Seed the destination before cutover and run incremental synchronization until the final delta is small.
2. Keep one shared/object data copy and scale readers independently, adding caching where useful.
3. Modify the EBS volume to increase capacity, then extend the partition/filesystem as required by the guest OS.
4. Use Amazon EFS for an elastic shared NFS namespace.
5. Use Amazon S3 for the growing immutable object repository.

Correct Answer: E

 

Correct Answer

Answer E is correct because S3 capacity scales without preallocating block devices and is designed for large object collections. This directly meets the decisive requirement: S3 object storage.

Incorrect Answers

Answer A is incorrect because A pre-copy plus incremental sync moves most bytes before the outage and shortens the final migration window. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 object storage.

Answer B is incorrect because Read fan-out is better served by shared scalable storage and caches than by maintaining a full private copy on every compute node. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 object storage.

Answer C is incorrect because EBS supports modifying many volume attributes without replacing the volume, while the OS still must consume the added capacity correctly. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 object storage.

Answer D is incorrect because EFS grows and shrinks automatically with stored data while remaining concurrently accessible to Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: S3 object storage.

 

Question 27

A shared Linux dataset grows unpredictably and hundreds of clients require the same namespace. Which managed storage service expands without pre-sizing a fixed volume?

1. Use Amazon EFS for an elastic shared NFS namespace.
2. Use Amazon S3 for the growing immutable object repository.
3. Keep one shared/object data copy and scale readers independently, adding caching where useful.
4. Seed the destination before cutover and run incremental synchronization until the final delta is small.
5. Modify the EBS volume to increase capacity, then extend the partition/filesystem as required by the guest OS.

Correct Answer: A

 

Correct Answer

Answer A is correct because EFS grows and shrinks automatically with stored data while remaining concurrently accessible to Linux clients. This directly meets the decisive requirement: EFS.

Incorrect Answers

Answer B is incorrect because S3 capacity scales without preallocating block devices and is designed for large object collections. It may be useful elsewhere, but it does not meet the decisive requirement here: EFS.

Answer C is incorrect because Read fan-out is better served by shared scalable storage and caches than by maintaining a full private copy on every compute node. It may be useful elsewhere, but it does not meet the decisive requirement here: EFS.

Answer D is incorrect because A pre-copy plus incremental sync moves most bytes before the outage and shortens the final migration window. It may be useful elsewhere, but it does not meet the decisive requirement here: EFS.

Answer E is incorrect because EBS supports modifying many volume attributes without replacing the volume, while the OS still must consume the added capacity correctly. It may be useful elsewhere, but it does not meet the decisive requirement here: EFS.

 

Question 28

A single EC2 database needs more block capacity while preserving its filesystem. Which EBS capability can increase the volume size without replacing it in many supported cases?

1. Seed the destination before cutover and run incremental synchronization until the final delta is small.
2. Modify the EBS volume to increase capacity, then extend the partition/filesystem as required by the guest OS.
3. Keep one shared/object data copy and scale readers independently, adding caching where useful.
4. Use Amazon S3 for the growing immutable object repository.
5. Use Amazon EFS for an elastic shared NFS namespace.

Correct Answer: B

 

Correct Answer

Answer B is correct because EBS supports modifying many volume attributes without replacing the volume, while the OS still must consume the added capacity correctly. This directly meets the decisive requirement: modify volume.

Incorrect Answers

Answer A is incorrect because A pre-copy plus incremental sync moves most bytes before the outage and shortens the final migration window. It may be useful elsewhere, but it does not meet the decisive requirement here: modify volume.

Answer C is incorrect because Read fan-out is better served by shared scalable storage and caches than by maintaining a full private copy on every compute node. It may be useful elsewhere, but it does not meet the decisive requirement here: modify volume.

Answer D is incorrect because S3 capacity scales without preallocating block devices and is designed for large object collections. It may be useful elsewhere, but it does not meet the decisive requirement here: modify volume.

Answer E is incorrect because EFS grows and shrinks automatically with stored data while remaining concurrently accessible to Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: modify volume.

 

Question 29

A read-heavy application adds ten times more readers but the underlying objects do not change. Which architecture avoids copying the complete dataset to every reader host?

1. Modify the EBS volume to increase capacity, then extend the partition/filesystem as required by the guest OS.
2. Seed the destination before cutover and run incremental synchronization until the final delta is small.
3. Use Amazon S3 for the growing immutable object repository.
4. Use Amazon EFS for an elastic shared NFS namespace.
5. Keep one shared/object data copy and scale readers independently, adding caching where useful.

Correct Answer: E

 

Correct Answer

Answer E is correct because Read fan-out is better served by shared scalable storage and caches than by maintaining a full private copy on every compute node. This directly meets the decisive requirement: shared/object storage plus caching.

Incorrect Answers

Answer A is incorrect because EBS supports modifying many volume attributes without replacing the volume, while the OS still must consume the added capacity correctly. It may be useful elsewhere, but it does not meet the decisive requirement here: shared/object storage plus caching.

Answer B is incorrect because A pre-copy plus incremental sync moves most bytes before the outage and shortens the final migration window. It may be useful elsewhere, but it does not meet the decisive requirement here: shared/object storage plus caching.

Answer C is incorrect because S3 capacity scales without preallocating block devices and is designed for large object collections. It may be useful elsewhere, but it does not meet the decisive requirement here: shared/object storage plus caching.

Answer D is incorrect because EFS grows and shrinks automatically with stored data while remaining concurrently accessible to Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: shared/object storage plus caching.

 

Question 30

A migration must move 50 TB from one filesystem to another with minimal application interruption. Which approach best reduces the final cutover window?

1. Modify the EBS volume to increase capacity, then extend the partition/filesystem as required by the guest OS.
2. Seed the destination before cutover and run incremental synchronization until the final delta is small.
3. Use Amazon EFS for an elastic shared NFS namespace.
4. Use Amazon S3 for the growing immutable object repository.
5. Keep one shared/object data copy and scale readers independently, adding caching where useful.

Correct Answer: B

 

Correct Answer

Answer B is correct because A pre-copy plus incremental sync moves most bytes before the outage and shortens the final migration window. This directly meets the decisive requirement: pre-copy then incremental synchronization.

Incorrect Answers

Answer A is incorrect because EBS supports modifying many volume attributes without replacing the volume, while the OS still must consume the added capacity correctly. It may be useful elsewhere, but it does not meet the decisive requirement here: pre-copy then incremental synchronization.

Answer C is incorrect because EFS grows and shrinks automatically with stored data while remaining concurrently accessible to Linux clients. It may be useful elsewhere, but it does not meet the decisive requirement here: pre-copy then incremental synchronization.

Answer D is incorrect because S3 capacity scales without preallocating block devices and is designed for large object collections. It may be useful elsewhere, but it does not meet the decisive requirement here: pre-copy then incremental synchronization.

Answer E is incorrect because Read fan-out is better served by shared scalable storage and caches than by maintaining a full private copy on every compute node. It may be useful elsewhere, but it does not meet the decisive requirement here: pre-copy then incremental synchronization.

 

Question 31

A database shows 20% CPU but very high EBS queue length and I/O latency. Which resource is the likely bottleneck?

1. Choose an EC2 instance with higher EBS bandwidth or reduce demanded throughput.
2. Optimize the small-file and metadata access pattern.
3. Investigate the EBS I/O path and volume performance.
4. Redistribute keys/partitions or request load so work is not concentrated on one hot partition.
5. Check burst-credit or baseline-performance behavior for the resource.

Correct Answer: C

 

Correct Answer

Answer C is correct because High queue length and I/O latency with low CPU point to the storage path rather than compute saturation. This directly meets the decisive requirement: block I/O path.

Incorrect Answers

Answer A is incorrect because The instance EBS bandwidth ceiling can bottleneck an otherwise capable volume. It may be useful elsewhere, but it does not meet the decisive requirement here: block I/O path.

Answer B is incorrect because Metadata-heavy small-file workloads can be latency-bound by operations rather than aggregate byte throughput. It may be useful elsewhere, but it does not meet the decisive requirement here: block I/O path.

Answer D is incorrect because A hot partition limits throughput even when aggregate capacity elsewhere is unused. It may be useful elsewhere, but it does not meet the decisive requirement here: block I/O path.

Answer E is incorrect because Burst-capable resources can perform above baseline temporarily and then fall back after credits are exhausted. It may be useful elsewhere, but it does not meet the decisive requirement here: block I/O path.

 

Question 32

An application has an io2 volume provisioned for high throughput, but the EC2 EBS bandwidth metric is saturated. Where is the bottleneck?

1. Redistribute keys/partitions or request load so work is not concentrated on one hot partition.
2. Optimize the small-file and metadata access pattern.
3. Choose an EC2 instance with higher EBS bandwidth or reduce demanded throughput.
4. Investigate the EBS I/O path and volume performance.
5. Check burst-credit or baseline-performance behavior for the resource.

Correct Answer: C

 

Correct Answer

Answer C is correct because The instance EBS bandwidth ceiling can bottleneck an otherwise capable volume. This directly meets the decisive requirement: instance-to-EBS bandwidth.

Incorrect Answers

Answer A is incorrect because A hot partition limits throughput even when aggregate capacity elsewhere is unused. It may be useful elsewhere, but it does not meet the decisive requirement here: instance-to-EBS bandwidth.

Answer B is incorrect because Metadata-heavy small-file workloads can be latency-bound by operations rather than aggregate byte throughput. It may be useful elsewhere, but it does not meet the decisive requirement here: instance-to-EBS bandwidth.

Answer D is incorrect because High queue length and I/O latency with low CPU point to the storage path rather than compute saturation. It may be useful elsewhere, but it does not meet the decisive requirement here: instance-to-EBS bandwidth.

Answer E is incorrect because Burst-capable resources can perform above baseline temporarily and then fall back after credits are exhausted. It may be useful elsewhere, but it does not meet the decisive requirement here: instance-to-EBS bandwidth.

 

Question 33

One partition of a large object-processing workload receives nearly all requests while other partitions are idle. Which problem should be corrected?

1. Check burst-credit or baseline-performance behavior for the resource.
2. Redistribute keys/partitions or request load so work is not concentrated on one hot partition.
3. Choose an EC2 instance with higher EBS bandwidth or reduce demanded throughput.
4. Optimize the small-file and metadata access pattern.
5. Investigate the EBS I/O path and volume performance.

Correct Answer: B

 

Correct Answer

Answer B is correct because A hot partition limits throughput even when aggregate capacity elsewhere is unused. This directly meets the decisive requirement: partitioning/access distribution.

Incorrect Answers

Answer A is incorrect because Burst-capable resources can perform above baseline temporarily and then fall back after credits are exhausted. It may be useful elsewhere, but it does not meet the decisive requirement here: partitioning/access distribution.

Answer C is incorrect because The instance EBS bandwidth ceiling can bottleneck an otherwise capable volume. It may be useful elsewhere, but it does not meet the decisive requirement here: partitioning/access distribution.

Answer D is incorrect because Metadata-heavy small-file workloads can be latency-bound by operations rather than aggregate byte throughput. It may be useful elsewhere, but it does not meet the decisive requirement here: partitioning/access distribution.

Answer E is incorrect because High queue length and I/O latency with low CPU point to the storage path rather than compute saturation. It may be useful elsewhere, but it does not meet the decisive requirement here: partitioning/access distribution.

 

Question 34

An EFS workload stores millions of tiny files and performs directory scans; throughput MB/s is low but operation latency is high. Which pattern should be investigated?

1. Optimize the small-file and metadata access pattern.
2. Investigate the EBS I/O path and volume performance.
3. Check burst-credit or baseline-performance behavior for the resource.
4. Choose an EC2 instance with higher EBS bandwidth or reduce demanded throughput.
5. Redistribute keys/partitions or request load so work is not concentrated on one hot partition.

Correct Answer: A

 

Correct Answer

Answer A is correct because Metadata-heavy small-file workloads can be latency-bound by operations rather than aggregate byte throughput. This directly meets the decisive requirement: small-file/metadata overhead.

Incorrect Answers

Answer B is incorrect because High queue length and I/O latency with low CPU point to the storage path rather than compute saturation. It may be useful elsewhere, but it does not meet the decisive requirement here: small-file/metadata overhead.

Answer C is incorrect because Burst-capable resources can perform above baseline temporarily and then fall back after credits are exhausted. It may be useful elsewhere, but it does not meet the decisive requirement here: small-file/metadata overhead.

Answer D is incorrect because The instance EBS bandwidth ceiling can bottleneck an otherwise capable volume. It may be useful elsewhere, but it does not meet the decisive requirement here: small-file/metadata overhead.

Answer E is incorrect because A hot partition limits throughput even when aggregate capacity elsewhere is unused. It may be useful elsewhere, but it does not meet the decisive requirement here: small-file/metadata overhead.

 

Question 35

A burstable resource performs well after idle periods but slows during sustained load. Which resource characteristic should be checked?

1. Investigate the EBS I/O path and volume performance.
2. Choose an EC2 instance with higher EBS bandwidth or reduce demanded throughput.
3. Optimize the small-file and metadata access pattern.
4. Check burst-credit or baseline-performance behavior for the resource.
5. Redistribute keys/partitions or request load so work is not concentrated on one hot partition.

Correct Answer: D

 

Correct Answer

Answer D is correct because Burst-capable resources can perform above baseline temporarily and then fall back after credits are exhausted. This directly meets the decisive requirement: burst credits or baseline entitlement.

Incorrect Answers

Answer A is incorrect because High queue length and I/O latency with low CPU point to the storage path rather than compute saturation. It may be useful elsewhere, but it does not meet the decisive requirement here: burst credits or baseline entitlement.

Answer B is incorrect because The instance EBS bandwidth ceiling can bottleneck an otherwise capable volume. It may be useful elsewhere, but it does not meet the decisive requirement here: burst credits or baseline entitlement.

Answer C is incorrect because Metadata-heavy small-file workloads can be latency-bound by operations rather than aggregate byte throughput. It may be useful elsewhere, but it does not meet the decisive requirement here: burst credits or baseline entitlement.

Answer E is incorrect because A hot partition limits throughput even when aggregate capacity elsewhere is unused. It may be useful elsewhere, but it does not meet the decisive requirement here: burst credits or baseline entitlement.