Question 937 of 1,446
PCDE Practice Question: Deploy scalable and highly available databases in Google Cloud
Which GCP database service automatically replicates data across multiple zones within a region and provides an SLA of 99.999% for multi-region configurations?
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
✓
Cloud Spanner
Cloud Spanner is a globally distributed, strongly consistent relational database that automatically replicates data across zones. It offers 99.999% SLA for multi-region instances. Cloud SQL HA replicates across zones but has a lower SLA. Bigtable replicates asynchronously across regions but does not guarantee strong consistency. Firestore offers multi-region replication but not 99.999% SLA.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Firestore
Why it's wrong here
Firestore offers multi-region replication but its SLA is not 99.999%.
- ✗
Cloud SQL
Why it's wrong here
Cloud SQL HA replicates across zones but does not offer a multi-region SLA of 99.999%.
- ✗
Cloud Bigtable
Why it's wrong here
Bigtable replicates asynchronously across regions but does not guarantee strong consistency nor a 99.999% SLA.
- ✓
Cloud Spanner
Why this is correct
Spanner automatically replicates data across zones and regions (multi-region) and provides 99.999% SLA for multi-region configurations.
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Last reviewed: Jul 4, 2026
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