AZ-104 Deploy and Manage Azure Compute Practice Test 2 — 15 Questions

Question 1

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

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Azure Backup

Answer

A Recovery Services vault

Question 2

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.

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A proximity placement group

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A private endpoint

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A custom script extension

Question 3

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.

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Stop

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Restart

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Capture

Question 4

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

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A Recovery Services vault

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Boot diagnostics

Question 5

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

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Boot diagnostics

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A proximity placement group

Question 6

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 7

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 8

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

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A network security group

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A public IP address

Question 9

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 10

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 11

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

Question 12

You are deploying a stateless web application on Azure virtual machines. The solution must automatically add and remove instances based on CPU demand and allow all instances to be managed as one logical group. Which Azure compute feature should you deploy?

Accepted Answer

A Virtual Machine Scale Set. A Virtual Machine Scale Set (VMSS) is the correct Azure compute feature because it automatically manages a group of identical, load-balanced VMs that can scale in and out based on CPU demand using autoscale rules. It treats all instances as a single logical group, enabling unified management, patching, and application deployment, which is exactly what the stateless web application requires.

Answer

An availability set

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A Recovery Services vault

Answer

Boot diagnostics

Question 13

A line-of-business application must keep running even if one datacenter in an Azure region has an outage. Which deployment option should you choose for the VMs?

Accepted Answer

Availability zones. Availability zones (Option C) are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. Deploying VMs across two or more zones ensures that if one datacenter fails, the application continues running in the other zone, meeting the requirement for resilience against a single datacenter outage.

Answer

An availability set

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A single virtual machine with Premium SSD

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A proximity placement group

Question 14

A line-of-business app requires protection against a datacenter outage in a region that supports zones. You want the strongest placement resilience available for the VMs. What should you choose?

Accepted Answer

Availability zone. Availability zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. Deploying VMs across zones provides the strongest resilience against a datacenter outage because if one zone fails, the other zones remain operational. This is the highest level of protection available within a single region for IaaS VMs.

Answer

Availability set

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Virtual machine scale set

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Resource lock

Question 15

A company runs two identical Linux VMs for a stateless web app in an Azure region that supports availability zones. The business requires protection from a full datacenter outage, not just planned host maintenance. Which deployment choice best meets this requirement?

Accepted Answer

Deploy the VMs across availability zones.. Option B is correct because deploying the two VMs across different availability zones ensures that each VM resides in a physically separate datacenter within the region. This architecture protects against a full datacenter outage, as an availability zone failure affects only one zone, leaving the other VM operational. Availability zones provide a 99.99% SLA for VMs when two or more instances are deployed across zones, which aligns with the requirement for protection beyond planned host maintenance.

Answer

Place both VMs in an availability set.

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Use a proximity placement group for both VMs.

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Deploy both VMs in a single-zone virtual machine scale set.