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Microsoft AZ-104 Practice Test 75

Question 740

An ADLS Gen2 storage account has a functioning private endpoint and private DNS, but application reads through that endpoint still receive authorization failures. Operators want to avoid exposing the service publicly. What else must be evaluated independently of the network path?

  1. Check the caller's Storage data-plane role and, for hierarchical namespace paths, the applicable filesystem ACLs
  2. Disable private DNS so the client resolves the public storage hostname
  3. Assign subscription Reader and assume it automatically permits the required Data Lake file reads
  4. Remove the private endpoint connection approval to force all clients to reauthenticate

Explanation

Correct Answer

A:

Private Link supplies the network route, not permission to read Data Lake files. An authenticated principal can still be denied by Azure Storage data RBAC or hierarchical filesystem ACLs even though private DNS and connectivity are correct.

Incorrect Answers

B:

DNS changes destination selection but does not grant file authorization. It may also violate the private-access security requirement while leaving the same identity permission failure.

C:

Management-plane Reader can inspect resource metadata but does not itself grant Blob data reads or traverse permissions on hierarchical file paths. Data-plane access requires the appropriate grants.

D:

Revoking the endpoint would break network connectivity and would not correct the caller's missing data permissions. Endpoint approval is not a substitute for RBAC and filesystem access control.

Question 741

A security team expects a private endpoint consumer to initiate requests into a PaaS service and also expects the service to open arbitrary reverse connections into the consumer VNet. Is that reverse behavior implied by Private Link?

  1. No; all private endpoints must be assigned public IPs before any communication
  2. No; use a separate supported communication channel for service-initiated callbacks
  3. Yes; approving a private endpoint automatically peers both VNets bidirectionally
  4. Yes; private DNS zone linking automatically permits inbound TCP from the service

Explanation

Correct Answer

B:

Private Link enables consumers to reach an eligible provider service through a private endpoint. It does not grant the provider general-purpose layer-three reachability back into every consumer workload.

Incorrect Answers

A:

Private endpoints use private VNet addresses. Requiring public IPs would contradict their purpose and does not explain the desired reverse connection.

C:

Private endpoint approval is not VNet peering. It does not create arbitrary bidirectional VM-to-VM routing between producer and consumer networks.

D:

Private DNS resolves names and does not establish reverse transport permissions or network routes from the service into a consumer subnet.

Question 742

Two VMs in different subnets of one Azure VNet must resolve an internal service name app.corp.internal without creating a public DNS record. The organization wants Azure-hosted private-zone records usable by linked VNets. Which service should it configure?

  1. An Azure DNS private zone linked to the VNet
  2. A public Azure DNS zone with an A record exposed to the internet
  3. An Azure Private Link endpoint without creating the app.corp.internal A record
  4. A custom DNS server placed on only one VM without forwarding or resolver configuration for the other clients

Explanation

Correct Answer

A:

An Azure DNS private zone provides internal DNS records to virtual networks linked for resolution. The service can publish the internal A record without exposing it through a public DNS zone.

Incorrect Answers

B:

A public DNS zone distributes records through public authoritative name servers, which violates the internal-only name-resolution requirement.

C:

A private endpoint creates access to a private service but does not automatically define this arbitrary internal application hostname in a linked DNS zone.

D:

A resolver attached to one machine does not automatically serve both subnets or create a linked Azure-managed zone. Clients still lack consistent internal name resolution.

Question 743

An operations team manages an Azure Private DNS zone in Tenant A. A partner has an Azure virtual network in Tenant B, and both parties want that VNet to resolve the private zone. Authorized admins have been delegated write permissions for the zone and target VNet. The team assumes a private DNS zone can only link VNets from its own tenant. Which approach is supported?

  1. Create a virtual network link from the private DNS zone to the partner VNet using authorized identities with write access to both resources
  2. Transfer the partner VNet and all its workloads into Tenant A because virtual network links cannot cross tenant boundaries
  3. Create Azure VNet peering between tenants and rely on peering alone to publish the private zone without a virtual network link
  4. Delegate the private zone in public DNS so that private-only records are automatically resolved by the partner VNet

Explanation

Correct Answer

A:

Azure Private DNS supports virtual network links to a VNet in another subscription or tenant when the operators have the necessary write permissions on the private DNS zone and the target VNet. The link supplies the zone-resolution association; authentication and authorization must be arranged on both resources. No tenant migration or public DNS exposure is needed merely to resolve the private records.

Incorrect Answers

B:

The subscriptions or tenants do not have to be merged to link a VNet to Azure Private DNS. Migrating the partner network and its workloads would introduce unrelated identity, resource ownership, and operational changes. The relevant prerequisite is the right to write both the zone and the VNet, followed by creating the private-zone virtual network link.

C:

VNet peering supplies network reachability, not automatic registration of private DNS zone links. Two independently administered networks can be peered without sharing Azure-provided private DNS zone resolution. A cross-tenant zone link with appropriate resource permissions is the direct action in this case; peering by itself cannot create that link.

D:

Public DNS delegation concerns internet-facing authoritative DNS zones and does not grant Azure Private DNS visibility to an Azure VNet. Publishing private-only DNS names publicly could also violate the intended isolation boundary. Keep the zone private and authorize a virtual network link to the partner VNet with the required permissions.

Question 744

A virtual network links to a private DNS zone. Operators want supported Azure virtual machines in the linked VNet to register or update their private host records automatically rather than adding every A record by hand. Which link feature matters?

  1. Create a private DNS A record manually for each current VM and assume Azure will maintain those records when NIC addresses change
  2. Link the VNet to the zone for resolution only and assume that a resolution link automatically creates VM A records
  3. Enable auto-registration on the VNet link for the private DNS zone where supported
  4. Enable auto-registration on a different linked VNet that does not contain the VMs to be registered

Explanation

Correct Answer

C:

Private DNS VNet links can enable automatic registration of VM records into the zone. A link configured only for resolution does not provide that registration behavior.

Incorrect Answers

A:

Manually authored A records may resolve the present address but do not activate VNet-linked auto-registration. When a VM is added, removed, or its IP changes, the records can become stale; automatic registration is a property of the appropriate private-zone VNet link.

B:

Resolution-only links allow the VNet to query private DNS records but do not create those records for its VMs. Azure creates and updates supported VM records only when auto-registration is enabled on the appropriate link.

D:

Registration applies to eligible VMs in the VNet associated with the registration-enabled link. Enabling it on an unrelated VNet cannot create or maintain the requested host records for the source VNet.

Question 745

A company creates an Azure DNS public zone for example.org and adds an A record for www. External resolvers still use the old DNS host because the parent domain is delegated elsewhere. What should be updated?

  1. Change the name-server records only inside the Azure-hosted child zone and assume the registrar automatically updates delegation
  2. Create a private DNS virtual network link instead of public delegation
  3. Change the Azure DNS zone's SOA primary server value instead of editing NS delegation at the domain registrar
  4. Update the domain registrar or parent zone NS delegation to the Azure DNS name servers

Explanation

Correct Answer

D:

Public DNS queries follow delegation from the parent namespace. Creating a zone in Azure alone does not redirect global resolvers until the parent NS records point to it.

Incorrect Answers

A:

The public recursive lookup uses the parent zone's delegation first. Editing records only inside Azure's child zone does not redirect the parent NS delegation to Azure DNS.

B:

Private DNS links affect resolution inside linked VNets and do not make Azure the authoritative public DNS provider for the Internet domain.

C:

The SOA record within the new zone is not the parent zone's authoritative NS referral. External resolvers will still follow the registrar or parent delegation until it is updated.

Question 746

An on-premises DNS server must resolve private endpoint names hosted in a private DNS zone linked to an Azure hub VNet. The team wants a managed Azure target for conditional forwarding without maintaining DNS VMs. Which component should on-premises DNS forward to?

  1. Point on-premises conditional forwarding at the public Azure DNS authoritative name servers
  2. The private IP of an Azure DNS Private Resolver inbound endpoint
  3. Point on-premises DNS to a Private Resolver outbound endpoint
  4. Link the private DNS zone to the hub VNet but provide no forwarding destination for the on-premises server

Explanation

Correct Answer

B:

The inbound endpoint accepts DNS requests from reachable external networks and can resolve linked Azure private zones. The on-premises conditional forwarder targets that private IP.

Incorrect Answers

A:

Azure public DNS serves publicly delegated zones, not private DNS zones linked to the Azure hub VNet. The forwarded query would not reach the linked private resolver view.

C:

An outbound endpoint forwards Azure-originated queries toward external servers; it is not the managed inbound listener that on-premises DNS should query for Azure private zones.

D:

A VNet link enables Azure network clients to resolve private names but does not, by itself, tell an external on-premises resolver where to send its conditional queries.

Question 747

Azure VMs use Azure-provided DNS but must resolve internal names under corp.example to an on-premises DNS server. No custom DNS VM should be maintained. Which managed DNS architecture fits the Azure-to-on-premises direction?

  1. Azure DNS Private Resolver outbound endpoint with a forwarding ruleset linked to the VNet
  2. Publish the internal corp.example records in Azure Public DNS and rely on Internet resolution
  3. An inbound-only resolver endpoint with no forwarding rules
  4. Configure only a Private Resolver inbound endpoint and forward all Azure queries to it

Explanation

Correct Answer

A:

An outbound endpoint plus linked DNS forwarding ruleset can route matching domain queries from Azure-linked VNets to the specified on-premises DNS server.

Incorrect Answers

B:

Public DNS makes names visible externally and does not preserve the hybrid private namespace or conditional forwarding model the organization needs.

C:

An inbound endpoint accepts queries arriving into Azure; this case requires Azure-originated queries forwarded out to external servers.

D:

An inbound endpoint receives queries from elsewhere. Azure-originated conditional forwarding to on-prem DNS requires the outbound path and matching ruleset.

Question 748

A public web endpoint is served using an Azure Public IP resource. An administrator wants the DNS A record to follow the Azure Public IP resource rather than manually editing a literal address if the resource changes. Which supported Azure DNS mechanism should be considered?

  1. A standard A record with a hardcoded IPv4 value and no follow-up automation
  2. Use a public CNAME whose target is the current numeric IPv4 address
  3. An alias record set targeting the Azure Public IP resource
  4. Use an Azure DNS PTR record for the public IP resource

Explanation

Correct Answer

C:

Azure DNS alias records can reference supported Azure resources such as a Public IP so the DNS response follows the targeted resource. This reduces manual literal-IP maintenance.

Incorrect Answers

A:

A fixed address record can become stale if the public IP resource changes. It does not create the requested resource-level binding.

B:

A CNAME target is a DNS name rather than a numeric IPv4 literal. Even an ordinary A record with a fixed address would not automatically track Azure Public IP resource changes.

D:

PTR records map an IP to a name in reverse DNS. They do not create a forward public A alias that follows Azure resource configuration.

Question 749

An Azure DNS Private Resolver has an outbound endpoint and a forwarding rule for corp.example to on-premises DNS. VMs in spoke-vnet still receive NXDOMAIN for corp.example, while the same rule works from hub-vnet. What missing association is a likely explanation?

  1. Add a public DNS A record for every on-premises computer
  2. Link the forwarding ruleset only to hub-vnet and assume peering applies the forwarding policy to spokes
  3. Link the forwarding ruleset to spoke-vnet, the virtual network where the queries originate
  4. Create another private endpoint for the DNS resolver inbound IP

Explanation

Correct Answer

C:

Forwarding rules apply to virtual networks linked to the ruleset. A rule and outbound endpoint alone do not extend the forwarding behavior to an unlinked spoke.

Incorrect Answers

A:

Publishing private internal computer names in public DNS bypasses the intended hybrid conditional forwarding boundary and may disclose internal records.

B:

Peering may connect VNets, but a DNS forwarding ruleset does not automatically become active for the querying spoke without its link.

D:

An inbound endpoint allows external DNS servers to send queries into Azure; the case concerns Azure VM queries being forwarded outbound to on-premises servers.

Question 750

An administrator attempts to deploy a DNS Private Resolver outbound endpoint in a subnet that already contains application NICs. The deployment is rejected. Which subnet design change should be made?

  1. Use the application subnet for the outbound resolver endpoint but delegate only the existing inbound endpoint subnet to Microsoft.Network/dnsResolvers
  2. Turn off the VNet DNS settings and use public recursive DNS only
  3. Configure a DNS forwarding ruleset linked to the VNet while leaving the outbound endpoint in the non-delegated application NIC subnet
  4. Use a dedicated subnet delegated to Microsoft.Network/dnsResolvers for the outbound endpoint

Explanation

Correct Answer

D:

A resolver outbound endpoint requires its own dedicated, properly delegated subnet. It cannot share the application subnet with ordinary resources.

Incorrect Answers

A:

Each Private DNS Resolver endpoint needs a correctly delegated dedicated subnet. Delegating some other endpoint subnet does not make the app NIC subnet a valid place for the outbound endpoint.

B:

Changing upstream resolvers could break private or hybrid name resolution, but would not make an occupied subnet valid for the endpoint.

C:

A forwarding ruleset controls name forwarding behavior, but the resolver outbound endpoint still requires its own dedicated subnet delegation. Linking a ruleset does not repair the rejected endpoint placement.

Microsoft Azure Administrator (AZ-104) Practice Tests

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