AZ-104 Deploy and Manage Azure Compute Practice Test 3 — 15 Questions

Question 1

A Windows VM fails to start after a configuration change. You need to capture screenshots and serial console output to troubleshoot the boot problem. Which feature should you use?

Accepted Answer

Boot diagnostics. Boot diagnostics captures serial console output and screenshots of a VM during boot, which is essential for troubleshooting boot failures after a configuration change. This feature provides logs and visual data from the VM's boot process, accessible via the Azure portal or CLI, without requiring guest OS access.

Answer

Azure Backup

Answer

Just-in-Time VM access

Answer

Autoscale

Question 2

You need to reduce compute cost for a development virtual machine that is used only during business hours on weekdays. Which option provides the most direct built-in cost optimization?

Accepted Answer

Enable auto-shutdown on the VM.. B is correct because enabling auto-shutdown on the VM directly stops the VM during non-business hours (e.g., evenings and weekends), eliminating compute costs (which are billed per second while the VM is running). This is a built-in Azure feature that requires no additional infrastructure or manual intervention, making it the most direct cost-optimization method for a development VM with a predictable usage schedule.

Answer

Place the VM in an availability set.

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Convert the OS disk to premium SSD v2.

Answer

Create a site-to-site VPN.

Question 3

A virtual machine scale set must increase instance count when average CPU exceeds 75 percent and decrease when it stays below 30 percent. What Azure feature should you configure?

Accepted Answer

Autoscale settings. Autoscale settings are the correct feature because they allow you to define scale-out and scale-in rules based on performance metrics like average CPU percentage. In this scenario, you would configure a scale-out rule to increase the instance count when average CPU exceeds 75% and a scale-in rule to decrease it when CPU stays below 30%.

Answer

Availability zones

Answer

Azure Policy

Answer

Update management

Question 4

You need to run a script on VM-App02 immediately after deployment to install a custom monitoring agent. The solution should not require opening additional inbound management ports. What should you use?

Accepted Answer

Custom Script Extension. The Custom Script Extension (CSE) is the correct choice because it allows you to run a script on a VM immediately after deployment without opening any inbound management ports. CSE downloads and executes scripts on the VM via the Azure fabric, using the VM's outbound connectivity to Azure storage or GitHub, and does not require any inbound port (like RDP or WinRM) to be open. This meets the requirement of not opening additional inbound management ports while enabling post-deployment configuration.

Answer

Boot diagnostics

Answer

An inbound NSG rule for WinRM

Answer

A proximity placement group

Question 5

You need to run a stateless web workload on Azure virtual machines and automatically increase or decrease instance count based on demand. You also want a single management boundary for the VM instances. Which solution should you deploy?

Accepted Answer

A Virtual Machine Scale Set. A Virtual Machine Scale Set (VMSS) is the correct solution because it provides an autoscaling group of identical VMs that can automatically increase or decrease instance count based on demand (e.g., CPU or memory metrics). It also offers a single management boundary, allowing you to manage, monitor, and scale all instances as a unified resource rather than individually.

Answer

An availability set with individual VMs

Answer

Azure Backup

Answer

A Recovery Services vault

Question 6

You need to deploy several identical virtual machines and ensure that the failure of a single Azure host does not affect all of them. Which feature should you use?

Accepted Answer

An availability set. An availability set distributes virtual machines across multiple fault domains (physical hosts) and update domains within an Azure datacenter. By placing VMs in an availability set, you ensure that a failure of a single Azure host (fault domain) does not affect all VMs, as each VM is placed on a different physical host. This meets the requirement for isolation from a single host failure.

Answer

A proximity placement group

Answer

A private endpoint

Answer

A custom script extension

Question 7

An Azure virtual machine was moved to a host that is experiencing intermittent issues. You need to move the VM to a different Azure host while keeping the existing managed disks and configuration. Which action should you perform?

Accepted Answer

Redeploy. Redeploying the VM (Option C) is the correct action because it moves the VM to a new Azure host node while preserving the existing managed disks, virtual network, and configuration. The Azure platform automatically selects a healthy host, resolves transient hardware issues, and maintains the VM's identity and associated resources.

Answer

Stop

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Restart

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Capture

Question 8

You need to deploy 25 identical Azure virtual machines for a web application and scale the number of instances automatically based on CPU demand. Which Azure compute feature should you use?

Accepted Answer

A Virtual Machine Scale Set. A Virtual Machine Scale Set (VMSS) is the correct Azure compute feature because it allows you to deploy and manage a group of identical, load-balanced VMs whose number can automatically increase or decrease in response to CPU demand using autoscale rules. This directly meets the requirement for 25 identical VMs with automatic scaling based on CPU metrics.

Answer

An availability set

Answer

A Recovery Services vault

Answer

Boot diagnostics

Question 9

You need to run a script inside an Azure virtual machine after deployment to install application prerequisites. Which feature should you use?

Accepted Answer

A Custom Script Extension. The Custom Script Extension (CSE) is the correct feature because it allows you to run a script inside an Azure VM after deployment, making it ideal for installing application prerequisites. CSE downloads and executes scripts on the VM, supporting both Windows (via PowerShell) and Linux (via Bash) environments, and can be applied during initial provisioning or to an existing VM.

Answer

Azure Policy

Answer

Boot diagnostics

Answer

A proximity placement group

Question 10

You need to deploy a set of identical Azure virtual machines that can automatically scale out during demand spikes and scale in when usage falls. Which Azure feature should you use?

Accepted Answer

A Virtual Machine Scale Set. A Virtual Machine Scale Set (VMSS) is the correct Azure feature because it is designed specifically to deploy and manage a set of identical, load-balanced VMs that can automatically scale out (increase instance count) during demand spikes and scale in (decrease instance count) when usage falls, using autoscale rules based on metrics like CPU or memory.

Answer

An availability set

Answer

A Recovery Services vault

Answer

Boot diagnostics

Question 11

You need to deploy 30 identical Azure virtual machines for a web application and scale the instance count automatically based on CPU demand. Which Azure compute feature should you use?

Accepted Answer

A Virtual Machine Scale Set. Virtual Machine Scale Sets (VMSS) are designed specifically to deploy and manage a group of identical, load-balanced VMs that can automatically scale in or out based on CPU demand or other metrics. This matches the requirement for 30 identical VMs and autoscaling, making B the correct choice.

Answer

An availability set

Answer

A Recovery Services vault

Answer

Boot diagnostics

Question 12

You need to ensure that a virtual machine is protected by Azure Backup and can be restored from centralized backup data if the VM is deleted. Which Azure resource should you configure first?

Accepted Answer

A Recovery Services vault. A Recovery Services vault is the foundational Azure resource for Azure Backup. It stores backup data and recovery points, enabling centralized backup management and restoration even if the original VM is deleted. Without first configuring a Recovery Services vault, you cannot define backup policies or initiate backups for the VM.

Answer

An availability set

Answer

A network security group

Answer

A public IP address

Question 13

You need to deploy a group of identical Azure virtual machines and ensure they are distributed across fault domains and update domains to reduce the impact of host failures and planned maintenance. Which feature should you use?

Accepted Answer

An availability set. An availability set is the correct feature because it logically groups VMs to isolate them from each other during host failures and planned maintenance. It distributes VMs across up to 3 fault domains (each with separate power, cooling, and network) and up to 20 update domains (which are rebooted sequentially during maintenance), ensuring that not all VMs are impacted simultaneously.

Answer

A proximity placement group

Answer

A private endpoint

Answer

A custom script extension

Question 14

You need to run a PowerShell script inside a newly deployed Azure virtual machine to configure application settings immediately after deployment. Which feature should you use?

Accepted Answer

A Custom Script Extension. The Custom Script Extension (CSE) is the correct choice because it allows you to run a PowerShell script on an Azure VM after deployment, making it ideal for configuring application settings. CSE downloads and executes scripts on the VM using the Azure VM agent, and it can be invoked during VM creation or post-deployment via ARM templates, Azure CLI, or PowerShell.

Answer

Azure Policy

Answer

Boot diagnostics

Answer

An availability set

Question 15

You need to deploy 20 identical Azure virtual machines for a web application and automatically scale the number of instances based on CPU demand. Which Azure feature should you use?

Accepted Answer

A Virtual Machine Scale Set. A Virtual Machine Scale Set (VMSS) is the correct Azure feature because it allows you to deploy and manage a group of identical, load-balanced VMs that can automatically scale in or out based on CPU demand using autoscale rules. This directly meets the requirement for deploying 20 identical VMs with automatic scaling based on a performance metric like CPU utilization.

Answer

An availability set

Answer

A Recovery Services vault

Answer

Boot diagnostics