The correct choice is a multi-region placement with one read-write region and two read-only replicas. This configuration ensures read-your-writes consistency globally after failover because Cloud Spanner uses synchronous replication within the read-write region and asynchronous replication to the read-only replicas, guaranteeing that any write committed in the primary region is immediately visible to all subsequent reads, even after a regional failure triggers a failover. On the Google Professional Cloud Developer exam, this question tests your understanding of Spanner’s replication models and disaster recovery trade-offs; a common trap is assuming that two read-write regions would improve availability, but that introduces write conflicts and violates strong consistency. Remember the memory tip: “One writer, two readers—no conflicts, strong readers.”
PCD Integrating Google Cloud services Practice Question
This PCD practice question tests your understanding of integrating google cloud services. 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.
You are designing a multi-region disaster recovery strategy for a Cloud Spanner database. The application requires read-your-writes consistency globally after failover. Which configuration should you choose?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Multi-region placement with one read-write region and two read-only replicas.
Option D is correct because a multi-region placement with one read-write region and two read-only replicas provides strong consistency and failover capability. Option A is wrong because single region does not provide disaster recovery. Option B is wrong because Enterprise edition with leader optimization is a feature, not a configuration. Option C is wrong because two read-write regions would introduce write conflicts.
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.
✗
Multi-region placement with two read-write regions and a witness.
Why it's wrong here
Two read-write regions can cause write conflicts.
✗
Enterprise edition with multi-region configuration and default leader optimization.
Why it's wrong here
This is not a specific configuration; leader optimization is a feature.
✗
Single region with multiple zones.
Why it's wrong here
Single region does not provide cross-region disaster recovery.
✓
Multi-region placement with one read-write region and two read-only replicas.
Why this is correct
This is the standard multi-region configuration for strong consistency and disaster recovery.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
What to study next
Got this wrong? Here's your next step.
Identify which PCD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Integrating Google Cloud services — This question tests Integrating Google Cloud services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Multi-region placement with one read-write region and two read-only replicas. — Option D is correct because a multi-region placement with one read-write region and two read-only replicas provides strong consistency and failover capability. Option A is wrong because single region does not provide disaster recovery. Option B is wrong because Enterprise edition with leader optimization is a feature, not a configuration. Option C is wrong because two read-write regions would introduce write conflicts.
What should I do if I get this PCD question wrong?
Identify which PCD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This PCD 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 PCD exam.
Question Discussion
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