Google PCA Practice Question: Analyze and optimize technical and business processes
This PCA practice question tests your understanding of analyze and optimize technical and business processes. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is using Cloud Spanner to serve a global gaming application. They have a single instance in us-central1. Players in Asia experience high latency. The application reads and writes player profiles. The team wants to reduce latency for Asian players while keeping write latency low for global consistency. They need a solution that minimizes operational overhead and uses native Spanner capabilities. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a multi-region instance configuration that includes us-central1 and an Asian region.
A multi-region instance configuration in Cloud Spanner is the correct solution because it provides a single writable instance that spans multiple geographic regions, allowing reads and writes to be served locally in each region while maintaining strong global consistency. This minimizes latency for Asian players by enabling local reads and writes, and it uses native Spanner capabilities without additional operational overhead. Option A directly addresses the requirement for low write latency and global consistency by leveraging Spanner's built-in multi-region replication.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Configure a multi-region instance configuration that includes us-central1 and an Asian region.
Why this is correct
Multi-region configuration provides read-write replicas in Asia, reducing both read and write latency.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add read replicas in Asia using Spanner's read-only replicas.
Why it's wrong here
Read-only replicas improve read latency but writes still go to the primary in us-central1.
✗
Use Cloud CDN to cache player profiles at the edge.
Why it's wrong here
Cloud CDN caches static content; player profiles are dynamic and require consistency, making caching unsuitable.
✗
Create a new instance in asia-east1 and use Directed Read options to route reads from Asia.
Why it's wrong here
Directed Read is for read-only replicas; writes still go to the primary, maintaining high latency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Spanner's multi-region configuration with read replicas or separate instances, not realizing that Spanner's native multi-region setup provides both local reads and writes with strong consistency, unlike other databases that require separate read replicas or caching layers.
Detailed technical explanation
How to think about this question
Cloud Spanner's multi-region configuration uses synchronous Paxos-based replication across all configured regions, ensuring that writes are committed with global consistency and reads can be served from the nearest replica. Under the hood, Spanner uses TrueTime to assign commit timestamps, enabling external consistency across regions. In a real-world scenario, a gaming company with players in both the US and Asia would configure a multi-region instance with regions like us-central1 and asia-east1 to provide low-latency reads and writes for all players without sacrificing consistency.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Analyze and optimize technical and business processes — This question tests Analyze and optimize technical and business processes — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a multi-region instance configuration that includes us-central1 and an Asian region. — A multi-region instance configuration in Cloud Spanner is the correct solution because it provides a single writable instance that spans multiple geographic regions, allowing reads and writes to be served locally in each region while maintaining strong global consistency. This minimizes latency for Asian players by enabling local reads and writes, and it uses native Spanner capabilities without additional operational overhead. Option A directly addresses the requirement for low write latency and global consistency by leveraging Spanner's built-in multi-region replication.
What should I do if I get this PCA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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