Alibaba ACA-Cloud1 Practice Test Questions, Exam Dumps

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ACA-Cloud1 Alibaba Practice Test Questions and Exam

Question No 1:

Using a cloud computing service is simple and straightforward. One can choose the instance with desired specification, finish payment and then use it right away.

Moreover, the underlying physical machines are managed by cloud service providers and transparent to users.

A. TRUE
B. FALSE

Answer: A

Explanation:

Cloud computing services have become widely popular for their ease of use and efficiency. The description provided is accurate in the context of most cloud providers, such as Amazon Web Services (AWS), Microsoft Azure, or Google Cloud. Users typically select an instance based on their desired specifications (e.g., CPU, RAM, storage), make the payment, and the service is ready to use almost immediately.

One of the main advantages of cloud computing is its abstraction of underlying physical infrastructure. Cloud providers manage the physical hardware, including servers and data centers, while users interact only with virtual resources. The complexity of hardware maintenance, upgrades, and management is handled by the cloud provider, making it transparent to the users. As a result, users don’t need to worry about the physical machines, which allows them to focus on using the resources they’ve provisioned, such as virtual machines or storage.

This seamless experience is central to cloud computing, and the statement correctly highlights the simplified user interaction and transparent management of the physical hardware. Therefore, the correct answer is A. TRUE.

Question No 2:

A/An _________________ is a copy of data on a disk at a certain point in time.

A image
B snapshot
C template
D EIP

Answer: B

Explanation:

In the context of data storage and backup, a snapshot is a point-in-time copy of data stored on a disk. It essentially captures the exact state of the data at that moment, allowing for recovery or analysis at a later time. This is commonly used in virtual machines, storage systems, or cloud environments to create backups without interrupting ongoing operations.

Let’s break down the other options:

A (image): While an image can be a copy of data or a disk, it typically refers to a full, often static, copy of the entire disk or system. Images are generally used to clone systems or for disaster recovery, but they don’t capture incremental changes the way a snapshot does.
C (template): A template is a pre-configured, often master, version of a system or application. It is used to create new instances of virtual machines or other resources in a standardized manner. Templates are not typically used to capture the state of data at a specific point in time, but rather to serve as a model for replication.
D (EIP): EIP stands for Elastic IP, which is a static, public IP address designed for dynamic cloud computing. This is entirely unrelated to data storage or backups.

In contrast, a snapshot captures the state of data at a specific moment, allowing for backup, recovery, and rollback to that point in time. It’s commonly used in both cloud environments and local storage management. Therefore, the correct answer is B.

Question No 3:

Multiple lower-configuration I/O-optimized ECS instances can be used with ___________ to deliver a high-availability architecture.

A. Server Load Balancer
B. RDS
C. Auto Scaling
D. OSS

Answer: C

Explanation:

When aiming for high availability in a system architecture, it is crucial to ensure that resources are dynamically scalable and resilient to failures. In this case, multiple lower-configuration I/O-optimized ECS (Elastic Compute Service) instances are being used to deliver this architecture. The key to achieving high availability lies in the ability to scale the number of instances based on traffic load and system requirements, while also maintaining efficient resource utilization and fault tolerance.

A. A Server Load Balancer (SLB) is a common component used for distributing traffic among multiple instances in a system to ensure even load distribution. While it helps with distributing traffic across ECS instances, it alone does not manage the scaling of the instances themselves. The load balancer would work in conjunction with an auto-scaling solution to ensure high availability by redirecting traffic to healthy instances. Therefore, while important, it does not fully address the need for automatic scaling in a high-availability scenario.

B. RDS (Relational Database Service) is a fully managed database service that helps in setting up, operating, and scaling relational databases. Although RDS is used to ensure high availability and scalability of database workloads, it is not the correct answer for managing the scalability of ECS instances. RDS is focused on database management rather than on scaling compute resources like ECS instances.

C. The correct answer is Auto Scaling. Auto Scaling automatically adjusts the number of ECS instances based on the load or performance metrics such as CPU utilization or memory usage. It ensures that the architecture can respond to fluctuations in demand by adding or removing instances as needed, thus delivering a highly available and fault-tolerant system. By dynamically adjusting resources, Auto Scaling can ensure that there are always enough instances running to handle incoming traffic and maintain service availability, even during peak usage times.

D. OSS (Object Storage Service) is a scalable object storage service used for storing and retrieving large amounts of unstructured data, such as media files and backups. While OSS plays a role in the architecture by providing reliable storage, it does not directly address the scaling or availability of ECS instances. It is not suitable for ensuring high availability for compute instances like ECS.

Thus, the correct choice to deliver a high-availability architecture using multiple lower-configuration I/O-optimized ECS instances is C (Auto Scaling), as it enables dynamic adjustment of resources based on demand.

Question No 4:

What is the full name of ECS?

A. Elastic Compute Service
B. Elastic Computing Server
C. Elastic Cost Server
D. Elastic Communication Server

Answer: A

Explanation:

The full name of ECS is Elastic Compute Service, which is a cloud computing service provided by Alibaba Cloud. ECS is designed to provide scalable computing capacity in the cloud, allowing users to run applications and workloads without needing to maintain physical servers. ECS instances can be dynamically adjusted based on computing needs, which makes it flexible and cost-efficient for cloud-based infrastructure.

Option B: Elastic Computing Server is not the correct full name. While it may sound similar, it’s not the proper term for this service. "Elastic Computing Server" is not used in the context of cloud computing services offered by major cloud providers like Alibaba Cloud.
Option C: Elastic Cost Server is incorrect. The term "cost" refers to the pricing model, but it’s not related to the name of ECS. ECS is focused on computing resources, not cost as a primary descriptor.
Option D: Elastic Communication Server is also incorrect. Communication servers typically refer to services handling communications, such as messaging or networking, but ECS is focused on computing power rather than communication.

Thus, the correct answer is A. Elastic Compute Service, which accurately describes the cloud-based computing service used for running applications and services in a scalable environment.

Question No 5:

Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ______________?

A. ECS instances in different regions cannot communicate with each other on the intranet.
B. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
C. Server Load Balancer cannot be deployed for ECS instances in various regions.
D. Server Load Balancer can be deployed for ECS instances in various regions.

Answer: D

Explanation:

Alibaba Cloud's statement about not supporting intranet communication between products in different regions indicates that by default, communication over the internal network (intranet) between resources like ECS instances, databases, or object storage (OSS) that are located in different regions is not possible. However, this does not imply the following:

A. ECS instances in different regions cannot communicate with each other on the intranet.
This is correct because Alibaba Cloud does not support direct intranet communication between ECS instances that are in different regions. Therefore, this is an accurate interpretation of the restriction.
B. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
This is also correct. Alibaba Cloud restricts intranet communication between ECS instances and other products (like RDS or OSS) across different regions. As stated in the question, products in different regions cannot communicate on the intranet.
C. Server Load Balancer cannot be deployed for ECS instances in various regions.
This is true. Server Load Balancer (SLB) cannot distribute traffic across ECS instances located in different regions. The SLB can only be used within the same region for managing traffic across ECS instances.
D. Server Load Balancer can be deployed for ECS instances in various regions.
This is incorrect because the Server Load Balancer cannot be used across different regions. SLB is region-specific, and it can only handle traffic for ECS instances within the same region. Therefore, it is not possible to deploy an SLB for ECS instances in various regions. This option is the correct choice as the one that does not reflect the restriction described in the question.

In summary, the correct answer is D, as the deployment of a Server Load Balancer across multiple regions is not supported, contrary to the implication of the statement.

Question No 6:

If you are running an online ticket booking service with relatively fixed traffic, then which kind of charging mode is more suitable for you?

A. Pay-As-You-Go
B. Prepaid
C. Paypal-pay
D. bitcoin-pay

Correct answer: B

Explanation:

When managing an online ticket booking service with relatively fixed traffic, it is important to choose a charging mode that aligns with the predictable nature of your traffic and financial forecasting.

B. Prepaid
A prepaid charging model is ideal for situations where traffic patterns are relatively stable and predictable. This model allows businesses to pay in advance for services or resources, typically at a discounted rate, which makes it a cost-effective choice for businesses with fixed or predictable usage. Since your ticket booking service has fixed traffic, a prepaid model helps ensure that you can manage costs more effectively without worrying about fluctuating prices. By paying upfront, you can often take advantage of bulk discounts, lowering the overall cost for your business.

This model is particularly well-suited for businesses with stable demand, like an online ticket booking service, where resource usage (such as server capacity or database storage) is predictable over time. Prepaid plans also typically provide greater control over expenses and avoid unexpected charges that could arise from usage spikes.

A. Pay-As-You-Go
While the Pay-As-You-Go model might be suitable for services with fluctuating traffic and uncertain usage patterns, it is less ideal for a business with relatively fixed traffic. The Pay-As-You-Go model charges based on actual usage, which could result in higher costs if the usage spikes unexpectedly. Since your traffic is relatively stable, this model may lead to inefficiency in managing costs, as it could result in overpaying during periods of consistent demand.

C. Paypal-pay
The Paypal-pay option refers to the method of payment used by customers, not the charging model for the business. It is a form of transaction processing, where customers pay for their tickets via PayPal. While convenient for transactions, it does not directly impact how the service charges for resources or services.

D. bitcoin-pay
Similarly, bitcoin-pay is a specific method of payment that allows customers to pay with Bitcoin, a cryptocurrency. While it offers certain benefits such as lower transaction fees for international payments, it does not directly relate to the charging model for your business, nor is it inherently linked to fixed or variable traffic patterns.

Given that your business has relatively fixed traffic, the prepaid charging model (Option B) would be the most suitable, as it allows for more predictable and stable cost management.

Question No 7:

When we talk about the ‘Elastic’ feature for ECS product, we are not talking about _____________.

A. Elastic Computing
B. Elastic Storage
C. Elastic Network
D. Elastic Administration

Answer: D

Explanation:

The term "Elastic" in the context of the ECS (Elastic Cloud Storage) product primarily refers to the ability to dynamically scale resources to meet the needs of workloads without any manual intervention. This concept of "elasticity" is commonly used in cloud computing to describe systems that can automatically scale up or down, offering flexibility and efficiency.

Let’s break down the options:

A. Elastic Computing: This refers to the ability to scale computing resources, such as CPU or memory, in real-time. Elastic computing is a key feature of cloud environments, and while it is not the central focus of ECS, the cloud computing models that ECS uses are built around elastic principles. Thus, it would not be something that ECS is not talking about.

B. Elastic Storage: This directly ties to the core concept of ECS. Elastic storage means the ability to scale storage capacity up or down seamlessly based on user needs. ECS is specifically a product designed to provide this kind of elastic, scalable storage solution, so this is definitely within the scope of what ECS refers to when it mentions "elastic."

C. Elastic Network: Elastic networking refers to the dynamic allocation of network resources. Cloud providers often allow automatic scaling of network resources as traffic demands fluctuate. While ECS might not emphasize elastic networking in the same way, the broader cloud infrastructure that ECS is part of certainly supports elastic networking, so this concept is relevant to the environment in which ECS operates.

D. Elastic Administration: This option is not typically associated with the "Elastic" feature. Elastic administration would imply flexible management features, like administrative tools that scale automatically or adapt to user needs. While ECS provides flexibility in storage and computing, "elastic administration" isn't a term used to describe the core features of ECS. Management of the system is typically handled by administrators through specific tools and interfaces, but the "elastic" feature doesn’t directly apply to administration itself.

Therefore, the correct answer is D, as "Elastic Administration" is not a key feature when talking about the "Elastic" concept for ECS products. The focus is more on elastic computing, storage, and networking.

Question No 8:

Your website has high volume of traffic and sudden spikes for a very short time. In this scenario, ______________ can manage traffic peak efficiently and maintain a consistent user experience.

A. Server Load Balancer
B. Auto Scaling
C. RDS
D. VPC

Explanation:

When managing a website with high traffic volumes and sudden spikes, the goal is to ensure that the system can handle the load and provide a smooth, uninterrupted user experience. To achieve this, certain technologies can be used to scale resources dynamically, distribute traffic effectively, and manage the peak traffic efficiently.

A. Server Load Balancer is used to distribute incoming traffic across multiple servers, which can help to balance the load, but it does not inherently handle scaling to accommodate sudden spikes in traffic. While a load balancer ensures traffic is routed efficiently, it does not directly manage server capacity for handling traffic peaks.
B. Auto Scaling is the most appropriate solution in this scenario. It allows the infrastructure to automatically adjust the number of resources (such as virtual machines or instances) based on current demand. When there are sudden spikes in traffic, Auto Scaling will launch additional resources to handle the load and then scale down once the demand decreases, ensuring a consistent user experience during high-traffic periods.
C. RDS (Relational Database Service) is focused on database management and scalability but is not designed to handle web traffic spikes. RDS helps manage and scale databases, but it does not manage the web traffic itself.
D. VPC (Virtual Private Cloud) refers to the network configuration in the cloud and does not directly manage traffic spikes. While VPC allows you to define your network boundaries and structure, it does not handle the scalability of resources during traffic peaks.

The correct answer is B. Auto Scaling is the solution that will efficiently manage traffic peaks by automatically adjusting resource allocation based on real-time demand.

Question No 9:

Your website has oscillating traffic peaks that are difficult to predict in advance. In this scenario, it is recommended to use SLB and __________________ together with ECS.

A. RDS
B. Auto Scaling
C. VPC
D. MaxCompute

Answer: B

Explanation:

In a scenario where a website experiences oscillating traffic peaks, it's crucial to implement a solution that can dynamically adjust resources based on traffic demands. The combination of SLB (Server Load Balancer) and Auto Scaling with ECS (Elastic Compute Service) is an effective solution for handling unpredictable traffic peaks.

Option A (RDS): RDS (Relational Database Service) is used for managing databases in the cloud. While important for database management, RDS does not directly address the need for scaling compute resources in response to traffic fluctuations. It is not typically used for managing unpredictable website traffic peaks, which is the main concern in this scenario.
Option B (Auto Scaling): Auto Scaling is a key component for handling fluctuating traffic. It allows the infrastructure to automatically adjust the number of ECS instances based on the current demand, helping to manage traffic spikes efficiently. When combined with SLB, which distributes traffic across multiple servers, Auto Scaling ensures that there are enough resources to handle the increased load without over-provisioning and wasting resources when traffic drops. This makes it the most suitable choice for managing unpredictable traffic patterns.
Option C (VPC): VPC (Virtual Private Cloud) is a network management service that provides isolated networking environments in the cloud. While VPC is important for securing and segmenting resources, it does not directly help with the dynamic scaling of compute resources in response to traffic fluctuations.
Option D (MaxCompute): MaxCompute is a data processing platform primarily used for large-scale data analysis and computation. While it is a powerful tool for handling big data workloads, it does not directly address the issue of scaling compute resources to match website traffic peaks.

In summary, Auto Scaling is the most appropriate solution to combine with SLB and ECS to handle the oscillating traffic peaks, as it allows for automatic scaling of compute resources based on demand. This ensures that your website remains responsive during high traffic periods without requiring manual intervention or over-provisioning of resources.

Question No 10:

___________________ is a ready-to-use service that seamlessly integrates with Elastic Compute Service (ECS) to manage varying traffic levels without manual intervention.

A. Server Load Balancer
B. OSS
C. RDS
D. VPC

Answer: A

Explanation:

The service that integrates with Elastic Compute Service (ECS) to manage varying traffic levels without manual intervention is the Server Load Balancer (SLB). The Server Load Balancer is designed to distribute network or application traffic across multiple ECS instances, helping ensure that no single instance is overwhelmed by high traffic. This allows the system to scale dynamically, handling variations in traffic without requiring manual configuration.

A. Server Load Balancer is specifically built for this purpose. It ensures high availability and scalability by balancing the load between different ECS instances and adjusting as needed based on traffic demands. This seamless integration with ECS means that the system can automatically handle spikes in traffic and ensure that the application remains responsive and stable.

B. OSS (Object Storage Service) is primarily used for storing and managing data in the cloud, such as large amounts of unstructured data like images, videos, and backups. While it may be used in conjunction with ECS, it does not manage traffic levels or load balancing.

C. RDS (Relational Database Service) is a managed database service, often used for running and scaling relational databases like MySQL or PostgreSQL in the cloud. It is not designed for load balancing or managing varying traffic levels in ECS.

D. VPC (Virtual Private Cloud) is a service that allows users to create a logically isolated network within the cloud. While it provides networking capabilities, it does not handle traffic distribution or load balancing between ECS instances.

In summary, Server Load Balancer (SLB) is the correct service that automatically manages traffic levels by balancing the load across ECS instances, making it ideal for handling varying traffic without manual intervention.