Quick Answer
The answer is Azure Backup, as it is the only service that provides daily backup with long-term retention for up to 99 years while supporting application-consistent backups through Volume Shadow Copy Service (VSS). This makes it the ideal, cost-effective solution for retaining Azure VM backups for a mandatory 7-year period, as it manages backup policies and retention ranges natively without additional infrastructure. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your ability to distinguish between backup and disaster recovery services—a common trap is confusing Azure Site Recovery, which is designed for replication and failover, not archival backup. Another pitfall is assuming Azure VM snapshots alone suffice, but they lack managed retention and application consistency. Remember the memory tip: “Backup for the long haul, Site Recovery for the fall”—Azure Backup handles years of retention, while Site Recovery handles minutes of recovery.
This AZ-305 practice question tests your understanding of design infrastructure solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Your company has Azure virtual machines running a critical application. You need to back up these VMs daily and retain backups for 7 years. The solution must be cost-effective and support application-consistent backups. What should you use?
Azure Backup
Supports daily backup, long-term retention, and application-consistent backups.
Azure Files backup
Why wrong: For file shares, not VMs.
Azure Site Recovery
Why wrong: Designed for replication and failover, not backup.
Azure VM snapshots stored in Azure Storage
Why wrong: Not a managed backup solution.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Backup
Option D is correct because Azure Backup supports daily backup, long-term retention (up to 99 years), and application-consistent backups via VSS. Option A is wrong because Azure Site Recovery is for disaster recovery, not backup. Option B is wrong because Azure VM snapshots are not managed backups. Option C is wrong because Azure Files is for file shares, not VM backup.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Backup
Why this is correct
Supports daily backup, long-term retention, and application-consistent backups.
Related concept
Read the scenario before looking for a memorised answer.
Azure Files backup
Why it's wrong here
For file shares, not VMs.
Azure Site Recovery
Why it's wrong here
Designed for replication and failover, not backup.
Azure VM snapshots stored in Azure Storage
Why it's wrong here
Not a managed backup solution.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design infrastructure solutions — study guide chapter
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FAQ
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Backup — Option D is correct because Azure Backup supports daily backup, long-term retention (up to 99 years), and application-consistent backups via VSS. Option A is wrong because Azure Site Recovery is for disaster recovery, not backup. Option B is wrong because Azure VM snapshots are not managed backups. Option C is wrong because Azure Files is for file shares, not VM backup.
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This AZ-305 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-305 exam.
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