Question 847 of 999

Design business continuity solutions →hardMultiple ChoiceObjective-mapped

Quick Answer

The answer is to use multi-VM consistency groups with a replication frequency of 15 minutes. This configuration is correct because multi-VM consistency groups in Azure Site Recovery guarantee that all VMs within the group are recovered to the same crash-consistent point in time, which directly satisfies the requirement for cross-VM recovery across the database tier. Setting the replication frequency to 15 minutes aligns precisely with the 15-minute RPO while minimizing replication costs, as a higher frequency like 5 minutes would increase bandwidth and storage expenses unnecessarily. On the AZ-305 exam, this scenario tests your ability to balance recovery requirements with cost optimization, often appearing as a trap where candidates might choose a lower RPO frequency without considering cost implications. Remember that consistency groups solve the cross-VM recovery problem, not just individual VM protection. Memory tip: think “Group for consistency, 15 for thriftiness.”

AZ-305 Design business continuity solutions Practice Question

This AZ-305 practice question tests your understanding of design business continuity solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A company runs a critical multi-tier application on Azure VMs. The application includes a database tier that requires recovery across multiple VMs at the same point in time. The company uses Azure Site Recovery (ASR) for disaster recovery to a secondary region. The recovery point objective (RPO) is 15 minutes and the recovery time objective (RTO) is 1 hour. The database VMs have a high data change rate, and the company wants to minimize replication costs. Which combination of ASR configurations should they implement?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

Question 1hardmultiple choice

Read the full NAT/PAT explanation →

A
Use multi-VM consistency groups and set the replication frequency to 15 minutes.
Multi-VM consistency groups ensure crash-consistent recovery of all VMs to the same point. Setting replication frequency to 15 minutes meets the RPO and reduces the number of recovery points, lowering storage and network costs compared to the default 5-minute frequency.
B
Enable application-consistent recovery for all VMs and use ExpressRoute.
Why wrong: Application-consistent recovery incurs additional overhead and cost; ExpressRoute improves network reliability but does not minimize replication costs.
C
Use standard recovery plans and default replication policy.
Why wrong: Default replication creates recovery points every 5 minutes, which may be more frequent than needed and incurs higher costs without meeting the consistency requirement across VMs.
D
Configure a single recovery plan with manual failover and use Premium SSD managed disks.
Why wrong: Manual failover does not ensure consistent recovery points across VMs, and Premium SSD increases cost without addressing the RPO or consistency.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Use multi-VM consistency groups and set the replication frequency to 15 minutes.

Option A is correct because multi-VM consistency groups in Azure Site Recovery ensure that all VMs in the group are recovered to the same crash-consistent point in time, which meets the requirement for cross-VM recovery. Setting the replication frequency to 15 minutes aligns with the 15-minute RPO while minimizing replication costs by avoiding more frequent replication (e.g., 5 minutes) that would increase bandwidth and storage costs.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Use multi-VM consistency groups and set the replication frequency to 15 minutes.
Why this is correct
Multi-VM consistency groups ensure crash-consistent recovery of all VMs to the same point. Setting replication frequency to 15 minutes meets the RPO and reduces the number of recovery points, lowering storage and network costs compared to the default 5-minute frequency.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable application-consistent recovery for all VMs and use ExpressRoute.
Why it's wrong here
Application-consistent recovery incurs additional overhead and cost; ExpressRoute improves network reliability but does not minimize replication costs.
✗
Use standard recovery plans and default replication policy.
Why it's wrong here
Default replication creates recovery points every 5 minutes, which may be more frequent than needed and incurs higher costs without meeting the consistency requirement across VMs.
✗
Configure a single recovery plan with manual failover and use Premium SSD managed disks.
Why it's wrong here
Manual failover does not ensure consistent recovery points across VMs, and Premium SSD increases cost without addressing the RPO or consistency.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse application-consistent recovery (which ensures each VM's OS and apps are consistent) with cross-VM consistency (which ensures all VMs are recovered to the same point in time), leading them to choose Option B or C without recognizing the need for multi-VM consistency groups.

Detailed technical explanation

How to think about this question

Multi-VM consistency groups use crash-consistent snapshots taken across all VMs in the group at the same time, leveraging Azure Site Recovery's replication engine to coordinate snapshot timing. This is critical for database tiers like SQL Server Always On Availability Groups or SAP HANA where transaction logs must be consistent across VMs. The 15-minute replication frequency reduces the number of replication cycles compared to the default 5-minute setting, lowering both outbound data transfer costs and storage snapshot costs.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this AZ-305 question test?

Design business continuity solutions — This question tests Design business continuity solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Use multi-VM consistency groups and set the replication frequency to 15 minutes. — Option A is correct because multi-VM consistency groups in Azure Site Recovery ensure that all VMs in the group are recovered to the same crash-consistent point in time, which meets the requirement for cross-VM recovery. Setting the replication frequency to 15 minutes aligns with the 15-minute RPO while minimizing replication costs by avoiding more frequent replication (e.g., 5 minutes) that would increase bandwidth and storage costs.

What should I do if I get this AZ-305 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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