Question 582 of 1,446
PCDE Practice Question: Manage a solution that can span multiple database technologies
You are running a Memorystore for Redis instance with persistence disabled. The application requires high availability and data durability after a zone failure. What is the most cost-effective approach?
⚠ Common exam trap
Watch out — candidates often confuse data persistence (AOF/RDB) with high availability (cross-zone replication), leading them to choose Option B, which only addresses durability after a crash, not zone failure recovery.
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
✓
Use a Standard tier instance with cross-zone replication.
Standard tier Memorystore for Redis instances provide cross-zone replication by default, ensuring automatic failover and data durability in the event of a zone failure. This meets the high availability and data durability requirements without the need for manual exports or complex multi-region setups, making it the most cost-effective solution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a Basic tier instance and schedule periodic exports to Cloud Storage.
Why it's wrong here
Basic tier has no replication; exports provide durability but not HA (downtime on failure).
- ✗
Enable persistence using the AOF or RDB configuration in Memorystore.
Why it's wrong here
Memorystore does not support persistent storage; you cannot enable it.
- ✓
Use a Standard tier instance with cross-zone replication.
Why this is correct
Standard tier provides Multi-Zone replication for HA; data is replicated across zones.
- ✗
Deploy a Redis Cluster across multiple regions using Memorystore.
Why it's wrong here
Memorystore does not support cross-region replication; Redis Cluster is for sharding within a region.
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Last reviewed: Jul 4, 2026
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