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PCDE Practice Question: Deploy scalable and highly available databases in Google Cloud
An organization needs to design a disaster recovery plan for Cloud SQL for PostgreSQL with an RPO of 10 seconds and an RTO of 5 minutes. Which TWO solutions meet these requirements? (Choose 2)
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 SQL cross-region read replica with manual promotion.
Cloud SQL HA provides near-zero RPO and RTO under 60 seconds within the same region. Cross-region read replicas can achieve RPO of seconds if replication lag is low, and manual promotion takes minutes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cloud SQL cross-region read replica with manual promotion.
Why this is correct
If replication lag is under 10 seconds and manual promotion completes within 5 minutes, this meets the RPO and RTO.
- ✗
Export the database to Cloud Storage and import in another region.
Why it's wrong here
Export/import RTO is hours, not minutes.
- ✓
Cloud SQL HA with automatic failover to standby in the same region.
Why this is correct
HA offers RPO~0 and RTO<60s, meeting the requirements.
- ✗
Cloud SQL point-in-time recovery from backups.
Why it's wrong here
PITR RPO is limited by binary log retention (seconds) but RTO is hours for restore from backup.
- ✗
Use Cloud SQL automated backups with cross-region copy.
Why it's wrong here
Backup restore RTO is hours.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCDE exam.