The answer is to configure an auto-failover group between East US and West US using zone-redundant deployment within each region. This is correct because zone-redundant replicas in the Business Critical tier use synchronous replication with lower latency between availability zones in the same region, enabling failover times under 30 seconds while maintaining zero data loss, unlike cross-region geo-replication which introduces higher network latency. On the DP-300 exam, this scenario tests your understanding of how to balance RTO and RPO for business-critical workloads; a common trap is assuming geo-replication alone is sufficient, but the key is that zone-redundant replicas within the secondary region provide the synchronous, low-latency link needed to improve failover time. Remember the memory tip: “Zone for zero loss, geo for go slow” — zone-redundant replicas keep data synchronous and fast, while geo-replication alone sacrifices speed for distance.
DP-300 Practice Question: Plan and configure a high availability and disaster recovery environment
This DP-300 practice question tests your understanding of plan and configure a high availability and disaster recovery environment. 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.
You are the database administrator for a global e-commerce company. The company uses Azure SQL Database in the Business Critical service tier for its transactional database, db1, hosted in the East US region. The database is 500 GB and experiences high write throughput. The current disaster recovery solution uses active geo-replication to a secondary in West US, but during a recent failover drill, the failover took 45 seconds, exceeding the corporate RTO of 30 seconds. The RPO requirement is zero data loss. You need to improve the failover time while maintaining zero data loss. The secondary must be in a different Azure region for compliance. What should you do?
Increase the number of replicas in the Business Critical tier to 5.
Why wrong: More replicas don't reduce failover time.
B
Change the secondary to a General Purpose tier and use async replication.
Why wrong: Would lose zero data loss.
C
Configure an auto-failover group between East US and West US using zone-redundant deployment within each region and ensure the secondary is zone-redundant.
Reduces latency and failover time while maintaining sync replication.
D
Move both primary and secondary to Hyperscale tier and use named replicas.
Why wrong: Hyperscale does not guarantee zero data loss for all scenarios.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an auto-failover group between East US and West US using zone-redundant deployment within each region and ensure the secondary is zone-redundant.
Option B is correct because using an auto-failover group with a secondary in the same region (West US) but in a different availability zone provides synchronous replication with zero data loss and faster failover due to lower latency. Option A is wrong because increasing replicas does not reduce failover time significantly. Option C is wrong because changing to General Purpose would increase RPO. Option D is wrong because Hyperscale does not guarantee zero data loss in this context.
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.
✗
Increase the number of replicas in the Business Critical tier to 5.
Why it's wrong here
More replicas don't reduce failover time.
✗
Change the secondary to a General Purpose tier and use async replication.
Why it's wrong here
Would lose zero data loss.
✓
Configure an auto-failover group between East US and West US using zone-redundant deployment within each region and ensure the secondary is zone-redundant.
Why this is correct
Reduces latency and failover time while maintaining sync replication.
Related concept
Read the scenario before looking for a memorised answer.
✗
Move both primary and secondary to Hyperscale tier and use named replicas.
Why it's wrong here
Hyperscale does not guarantee zero data loss for all scenarios.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Trap categories for this question
Scenario analysis trap
Hyperscale does not guarantee zero data loss for all scenarios.
Detailed technical explanation
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Identify which DP-300 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.
Plan and configure a high availability and disaster recovery environment — This question tests Plan and configure a high availability and disaster recovery environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure an auto-failover group between East US and West US using zone-redundant deployment within each region and ensure the secondary is zone-redundant. — Option B is correct because using an auto-failover group with a secondary in the same region (West US) but in a different availability zone provides synchronous replication with zero data loss and faster failover due to lower latency. Option A is wrong because increasing replicas does not reduce failover time significantly. Option C is wrong because changing to General Purpose would increase RPO. Option D is wrong because Hyperscale does not guarantee zero data loss in this context.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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