DEA-C01 Data Store Management Practice Question
A data engineer is designing a disaster recovery strategy for an Amazon RDS for PostgreSQL database. The primary database is in us-east-1. Which TWO approaches provide cross-region disaster recovery?
⚠ Common exam trap
Test-takers frequently confuse Multi-AZ (which provides in-region high availability) with cross-region disaster recovery, or they assume manual snapshot copying is equivalent to automated cross-region backups, not realizing the significant difference in RPO and operational overhead.
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
✓
Configure cross-region automated backups to copy to us-west-2.
Amazon RDS supports cross-region automated backups, which automatically copy backup data (snapshots and transaction logs) from the primary region (us-east-1) to a secondary region (us-west-2). This provides a fully managed, automated disaster recovery solution that allows point-in-time recovery in the secondary region without manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure cross-region automated backups to copy to us-west-2.
Why this is correct
Backups are automatically copied and can be restored.
- ✗
Take a manual snapshot and copy it to us-west-2 daily.
Why it's wrong here
Manual snapshots are not automated and may have higher RPO.
- ✗
Use Amazon S3 cross-region replication for the database export.
Why it's wrong here
Not a native RDS feature; requires custom scripts.
- ✗
Enable Multi-AZ in us-east-1.
Why it's wrong here
Only protects within us-east-1.
- ✓
Create a cross-region read replica in us-west-2.
Why this is correct
Can be promoted to primary for disaster recovery.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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