Google PCA Practice Question: Analysing and Optimising Technical and Business Processes
A company wants to improve the performance of their Cloud SQL for PostgreSQL instance. They notice many idle connections and slow queries. Which THREE actions could help? (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 appropriate indexes
PgBouncer reduces connection overhead. Read replicas offload read queries. Adding indexes speeds up queries. Private IP improves security and latency but not performance. Increasing disk size helps if I/O bottleneck, but not connection or query performance.
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 appropriate indexes
Why this is correct
Speeds up slow queries.
- ✓
Add read replicas
Why this is correct
Offloads read queries, improving overall performance.
- ✓
Use PgBouncer for connection pooling
Why this is correct
Reduces overhead from many idle connections.
- ✗
Enable private IP
Why it's wrong here
Does not improve performance directly.
- ✗
Increase disk size
Why it's wrong here
Helps if IOPS bottleneck, but not for idle connections or query optimization.
Go deeper
Related to this question
Learn chapter
Introduction to Google Cloud Platform
Key term
Cloud SQL
Cloud SQL is a fully managed relational database service that lets you set up, maintain, and scale SQL databases (like MySQL, PostgreSQL, and SQL Server) in the cloud without managing the underlying infrastructure.
Key term
Latency
Latency is the time delay between a request being sent over a network and the response being received, often measured in milliseconds.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA 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 PCA exam.