Question 544 of 1,446
Manage a solution that can span multiple database technologies →mediumMultiple ChoiceObjective-mapped
PCDE Practice Question: Manage a solution that can span multiple database technologies
An engineer needs to create a cross-region read replica for a Cloud SQL for MySQL instance to improve read scalability and provide disaster recovery. What must be configured on the primary instance to support cross-region replication?
⚠ Common exam trap
Google often tests the misconception that network connectivity (like VPN) or backup features are required for replication, when in fact the core requirement is enabling the binary log on the primary instance to provide the change stream.
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
✓
Enable binary logging on the primary instance.
Cross-region replication for Cloud SQL for MySQL relies on MySQL's native binary log (binlog) based replication. Enabling binary logging on the primary instance records all data changes in binary log files, which the read replica in another region uses as the source for applying changes. Without binary logging enabled, the primary instance cannot provide the change stream necessary for cross-region replication to function.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable binary logging on the primary instance.
Why this is correct
Correct. Binary logging is required for any replication, especially cross-region.
- ✗
Enable automated backups and point-in-time recovery.
Why it's wrong here
While PITR uses binary logs, enabling automated backups alone doesn't enable binary logging. Binary logging must be explicitly enabled.
- ✗
Configure a Cloud VPN between the regions.
Why it's wrong here
Cloud SQL replication uses private IP within Google's network; VPN is not required.
- ✗
Set the primary instance to use MySQL 8.0.
Why it's wrong here
Version is not a requirement; binary logging is the key setting.
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Last reviewed: Jul 4, 2026
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.
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