Google PCA Practice Question: Analysing and Optimising Technical and Business Processes
A team runs a Cloud Spanner instance with a regional configuration. They need to increase write throughput for a global user base but are concerned about cost. What should they do?
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 more nodes to the instance
Adding nodes increases throughput and cost proportionally. Switching to multi-region increases latency for writes (due to synchronous replication) and cost. Using global indexes won't increase baseline write throughput. Recommending to use Firestore is not correct for this scenario.
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 more nodes to the instance
Why this is correct
Adding nodes increases both read and write throughput linearly.
- ✗
Use global indexes
Why it's wrong here
Indexes help queries but do not increase baseline write throughput.
- ✗
Migrate to Cloud Firestore in Datastore mode
Why it's wrong here
Firestore is not a direct replacement and may not meet requirements.
- ✗
Switch to a multi-region configuration
Why it's wrong here
Multi-region increases write latency and cost due to synchronous replication across continents.
Go deeper
Related to this question
Learn chapter
Introduction to Google Cloud Platform
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.
Key term
Multi-region
Multi-region refers to a deployment strategy where IT resources, applications, or data are hosted in multiple geographic locations to improve availability, disaster recovery, and performance.
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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.