Plan and configure a high availability and disaster recovery environment →easyMultiple ChoiceObjective-mapped
DP-300 Practice Question: Plan and configure a high availability and disaster recovery environment
You need to design a high availability solution for an Azure SQL Database that supports an online transaction processing (OLTP) application. The solution must provide automatic failover within seconds in case of a node failure and guarantee zero data loss. Which deployment option should you choose?
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
✓
Business Critical tier with zone redundancy
(Business Critical tier with zone redundancy) is correct because the Business Critical tier uses synchronous replication and a quorum-based commit to replicas, ensuring zero data loss on failover and failover within seconds. Option A (Basic tier) does not support zone redundancy or automatic failover with zero data loss. Option B (General Purpose tier) uses asynchronous replication, which may result in data loss during failover. Option C (Hyperscale tier) uses a log-based service with a buffer, which can lead to data loss on failover.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Basic tier with zone redundancy
Why it's wrong here
Basic tier does not support zone redundancy or zero data loss.
- ✗
General Purpose tier with zone redundancy
Why it's wrong here
General Purpose uses asynchronous replication and may have data loss.
- ✗
Hyperscale tier with zone redundancy
Why it's wrong here
Hyperscale does not guarantee zero data loss on failover.
- ✓
Business Critical tier with zone redundancy
Why this is correct
Business Critical provides synchronous replication and zero data loss.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
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