AZ-104 Deploy and Manage Azure Compute Practice Test 5 — 15 Questions

Question 1

You need to resize a VM to a larger size, but Azure says the target size is not available while the VM is running. What should you do first?

Accepted Answer

Deallocate the VM, then retry the resize.. When a VM is running, Azure may not have the target VM size available in the cluster hosting the VM. Deallocating the VM releases the underlying hardware resources and removes the VM from its current cluster, allowing Azure to select a new cluster that supports the desired size. After deallocation, the resize operation can succeed because the VM is no longer pinned to a specific host or cluster.

Answer

Delete the VM and recreate it from the image.

Answer

Attach a new data disk first.

Answer

Create an availability set for the VM.

Question 2

You want to preview what a Bicep deployment will change before you apply it to a resource group. Which command should you use?

Accepted Answer

az deployment group what-if. The `az deployment group what-if` command allows you to preview the changes a Bicep deployment will make to a resource group before actually applying them. It returns a list of resources that will be created, modified, or deleted, enabling you to validate the deployment's impact without committing any changes. This is the correct tool for a dry-run or validation scenario.

Answer

az vm create

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az monitor metrics list

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az deployment group create --mode Complete

Question 3

Two application VMs are in the same Azure region. They must stay available during planned host maintenance, but the business does not require protection from a full datacenter outage. Which placement option should you use?

Accepted Answer

Availability set. An availability set distributes VMs across multiple fault domains (up to 3) and update domains (up to 20) within a single Azure datacenter. This ensures that during planned host maintenance, only one update domain is taken offline at a time, keeping the application VMs available. Since the requirement does not include protection from a full datacenter outage, an availability set is the correct and cost-effective placement option.

Answer

Availability zone

Answer

Shared disk

Answer

Snapshot set

Question 4

You deploy a Windows Server VM and need to run several PowerShell commands after deployment without signing in to the VM. Which Azure feature should you use?

Accepted Answer

Use the Custom Script Extension on the VM.. The Custom Script Extension (CSE) is the correct Azure feature because it allows you to run PowerShell or Bash scripts on a VM after deployment without requiring interactive sign-in. It executes the script via the Azure VM Agent, which runs as a local system process, making it ideal for post-deployment configuration tasks like installing software or running commands.

Answer

Put the VM in an availability zone.

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Attach a managed identity and rely on Azure Policy.

Answer

Create a snapshot before startup.

Question 5

Two app VMs must stay available during planned host maintenance in the same region. Datacenter-level redundancy is not required, but the VMs should be spread across update domains. What should you configure?

Accepted Answer

Availability set. An availability set logically groups VMs to protect against planned maintenance events by distributing them across up to 3 fault domains and 20 update domains. This ensures that during host maintenance, only one update domain is taken offline at a time, keeping the other VMs available. Since datacenter-level redundancy is not required, an availability set is the correct choice.

Answer

Availability zone

Answer

Azure Backup

Answer

Managed disk

Question 6

A customer runs two Windows VMs in a region that does not support availability zones. The app can lose one VM but must keep running through planned maintenance and a single host failure. Which deployment pattern should you use?

Accepted Answer

Place both VMs in an availability set.. An availability set ensures that VMs are placed on different fault domains (separate physical hardware) and update domains (separate maintenance batches). This protects against both a single host failure and planned Azure maintenance, meeting the requirement that the app can lose one VM but keep running.

Answer

Use a single-instance deployment and add more backup jobs.

Answer

Use availability zones because they always exist in every region.

Answer

Put both VMs on the same dedicated host to avoid migration during maintenance.

Question 7

You need to resize a production VM from Standard_D2s_v5 to Standard_D4s_v5 by using Azure CLI. `az vm list-vm-resize-options` shows the target size, but `az vm resize` fails while the VM is running. Which action should you take first?

Accepted Answer

Run `az vm deallocate`, then resize the VM, then start it again.. Resizing a VM to a different size often requires the VM to be in a deallocated state, especially when the new size is in a different hardware cluster or when the VM is currently running and the resize operation fails. The `az vm deallocate` command releases the underlying hardware resources, allowing the VM to be resized to any available size, including Standard_D4s_v5, and then you can start it again. This is a common requirement for production VMs when live resizing is not supported or fails.

Answer

Run `az vm stop`, then resize the VM.

Answer

Run `az vm restart`, then resize the VM.

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Run `az vm generalize`, then recreate the VM from the image.

Question 8

Based on the exhibit, the company will deploy two identical web server VMs in East US 2 behind a load balancer. The service must keep running if one datacenter in the region becomes unavailable. Which deployment choice best meets the requirement?

Accepted Answer

Place one VM in each of two availability zones and front them with the load balancer.. Deploying one VM in each of two availability zones within East US 2 ensures that the VMs are physically separated across distinct datacenters, each with independent power, cooling, and networking. If one datacenter (zone) fails, the other zone remains operational, and the load balancer automatically directs traffic to the healthy VM. This meets the requirement of keeping the service running if one datacenter in the region becomes unavailable.

Answer

Place both VMs in an availability set so Azure can spread them across fault domains.

Answer

Place both VMs in one availability zone because all zones in a region share failure domains.

Answer

Deploy a single VM because Azure automatically replicates it across the region.

Question 9

A stateless web app runs on two Ubuntu VMs behind an Azure Load Balancer. The region supports availability zones. The business wants the app to survive a full datacenter outage and also avoid having both VMs on the same maintenance boundary. Which deployment should you choose?

Accepted Answer

Place the VMs in separate availability zones in the same region.. Deploying the VMs in separate availability zones ensures they are placed in physically distinct datacenters within the same region, protecting against a full datacenter outage. Additionally, each availability zone has its own fault and update domains, so the VMs will never share the same maintenance boundary, meeting both business requirements.

Answer

Place both VMs in a single availability set.

Answer

Deploy one VM and rely on Azure Backup for recovery.

Answer

Deploy both VMs without any fault-domain configuration.

Question 10

Match each Azure CLI command to the action it performs for a virtual machine.

Accepted Answer

az vm create: Creates a new virtual machine.. Each Azure CLI command performs the corresponding VM lifecycle action: create, start, stop, deallocate (releases resources), delete, or list.

Answer

az vm start: Stops a running virtual machine.

Answer

az vm stop: Deallocates a virtual machine.

Question 11

Match each Azure VM administration requirement on the left with the most appropriate Azure CLI command on the right. Use each answer once.

Accepted Answer

Deploy a new virtual machine: az vm create. Azure CLI commands for VM administration: 'az vm create' deploys, 'az vm resize' changes size, 'az vm start/stop/restart' controls state, and 'az vm delete' removes the VM.

Answer

Stop a virtual machine: az vm delete

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Delete a virtual machine: az vm restart

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Restart a virtual machine: az vm stop

Question 12

VM-App01 is responding slowly and appears to be on a degraded Azure host. You must keep the VM resource, keep its disks and NIC, and move it to fresh infrastructure before further troubleshooting. Which two actions can achieve that goal? Select two.

Accepted Answer

Redeploy the VM.. Redeploying the VM (Option A) moves the VM to a new Azure host node while preserving the VM resource, its disks, and NIC. This is the correct action because it resolves host-level degradation without deleting or recreating the VM. Stopping/deallocating the VM (Option D) releases the underlying hardware lease, which forces the VM to be placed on a new host when started again, also preserving the VM resource, disks, and NIC.

Answer

Delete the VM and recreate it from the OS disk.

Answer

Capture the VM into a generalized image.

Answer

Convert the VM to an availability set.

Question 13

A customer-facing service needs to survive a single datacenter outage in a zone-supported region. You do not need cross-region failover, but you do need Azure to spread instances without manual placement errors. Which two deployment choices satisfy that goal? Select two.

Accepted Answer

Place the VMs in different availability zones within the same region.. Availability zones are physically separate datacenters within a region, each with independent power, cooling, and networking. Placing VMs in different zones ensures that a single datacenter outage does not affect all instances, meeting the survivability requirement without manual placement errors. Azure automatically distributes VMs across selected zones, eliminating human error in instance placement.

Answer

Use an availability set and expect it to cover a zone outage.

Answer

Keep all instances in one zone and rely on the load balancer.

Answer

Use a paired region for automatic in-region zone balancing.

Question 14

A build agent VM is recreated from image every night. The OS can be lost on reimage, but build caches and artifacts must persist across rebuilds. The team also wants the cheapest OS storage option that supports this pattern. Which two choices should you make? Select two.

Accepted Answer

Use an ephemeral OS disk.. An ephemeral OS disk uses the local VM storage or temp SSD, which is destroyed when the VM is deallocated or reimaged. This matches the requirement that the OS can be lost on reimage. Option B is correct because placing build caches and artifacts on a separate managed data disk ensures they persist independently of the OS disk lifecycle; data disks are not affected by OS reimaging and can be reattached to the new VM instance.

Answer

Use a Premium SSD OS disk so the reimage is preserved.

Answer

Store the caches only on the temporary resource disk.

Answer

Use an availability set to make the OS disk persistent.

Question 15

A reporting server must be resized from 4 vCPU to 8 vCPU for a four-hour batch window. The VM name, NIC, private IP, and attached managed disks must stay the same, and the team accepts a brief outage during the change. Which two actions should you choose? Select two.

Accepted Answer

Deallocate the VM before changing its size.. Deallocating the VM (stopping it in the Azure portal) releases the underlying hardware reservation, which is required before changing the VM size to a different SKU. This ensures the VM can be resized to a supported size without conflicts, and the brief outage is acceptable as stated in the scenario.

Answer

Delete the VM and recreate it with a new size.

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Generalize the VM first to preserve the existing configuration.

Answer

Take a snapshot of the OS disk instead of resizing.