DP-300 Plan and implement data platform resources Practice Question
A company is deploying Azure SQL Managed Instance and needs to ensure that the failover group provides automatic failover with zero data loss during a regional outage. The secondary region is 500 miles away. Which data replication mode should be configured?
⚠ Common exam trap
Test-takers frequently assume asynchronous replication is acceptable for disaster recovery, but the question explicitly requires 'zero data loss,' which only synchronous replication can guarantee in a failover group 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
✓
Synchronous replication
Azure SQL Managed Instance failover groups require synchronous replication to guarantee zero data loss during automatic failover. Synchronous replication ensures that transactions are committed on both the primary and secondary replicas before acknowledging the commit, so no data is lost even if the primary region fails. This mode is mandatory for failover groups with the 'automatic failover' and 'zero data loss' requirements, despite the 500-mile distance which introduces latency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Synchronous replication
Why this is correct
Synchronous replication ensures zero data loss.
- ✗
Geo-replication
Why it's wrong here
Geo-replication is not a replication mode; it's a feature.
- ✗
Snapshot replication
Why it's wrong here
Snapshot replication is not supported in failover groups.
- ✗
Asynchronous replication
Why it's wrong here
Asynchronous replication may cause data loss during failover.
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Overview of Azure Data Platform Options
Key term
Azure SQL Managed Instance
Azure SQL Managed Instance is a fully managed cloud database service that gives you nearly all the features of Microsoft SQL Server on your own server, without you having to manage the hardware or operating system.
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