PCDOE Optimizing performance and cost Practice Question
A team uses Cloud SQL for MySQL. They have read-heavy traffic and want to reduce costs. Which strategy is most effective?
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 read replicas to offload read queries.
Using read replicas offloads read queries from the primary instance, allowing the primary to be downsized or use a lower-tier instance, reducing cost.
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 read replicas to offload read queries.
Why this is correct
Read replicas distribute reads, reducing primary load and enabling potential downsizing.
- ✗
Use committed use discounts.
Why it's wrong here
Committed use discounts provide a discount but do not reduce resource usage.
- ✗
Use High Availability with a standby instance.
Why it's wrong here
High Availability adds a standby instance, increasing cost.
- ✗
Use vertical scaling to increase instance size.
Why it's wrong here
Increasing instance size raises cost.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCDOE 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 PCDOE exam.