Question 494 of 1,446
Design innovative, scalable, and highly available cloud database solutions →mediumMultiple SelectObjective-mapped
PCDE Practice Question: Design innovative, scalable, and highly available cloud database solutions
A manufacturing company uses Cloud SQL for PostgreSQL for its inventory system. The database has grown and now experiences high read latency. The team wants to improve read performance without changing application code. Which THREE actions should they consider? (Choose 3)
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
✓
Add read replicas
Adding read replicas spreads read load, appropriate indexing speeds up queries, and increasing instance memory improves cache hit ratio. Sharding would require application changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add read replicas
Why this is correct
Offloads read traffic from the primary instance.
- ✓
Create appropriate indexes based on query patterns
Why this is correct
Indexes can dramatically speed up read queries.
- ✗
Migrate to Cloud Spanner
Why it's wrong here
Would require application changes and migration effort; not a simple fix.
- ✗
Implement database sharding
Why it's wrong here
Requires application changes to route queries.
- ✓
Increase the instance's memory allocation
Why this is correct
More memory allows larger buffer pool and better cache hit ratio.
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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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