Google PCA Manage implementation of cloud architecture Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 cloud architect is implementing a CI/CD pipeline for a microservices-based application on Google Kubernetes Engine (GKE). The team needs to deploy new versions of the services with zero downtime and the ability to quickly roll back if issues are detected. Which two strategies should the architect consider? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Blue/green deployment
Blue/green deployment (A) and canary deployment (C) are two strategies that provide zero downtime and quick rollback. Blue/green deploys new version to a separate environment and switches traffic; canary gradually shifts traffic and allows easy rollback. Rolling update (B) also provides zero downtime but rollback requires a new update, not immediate. Shadow deployment (D) mirrors traffic for analysis but doesn't serve users. A/B testing (E) is a method for comparing features but not a deployment strategy.
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.
✗
Shadow deployment
Why it's wrong here
Incorrect: shadow deployment mirrors traffic for testing but does not serve users directly; rollback is not inherent.
✗
Rolling update
Why it's wrong here
Incorrect: rolling updates provide zero downtime but rollback is not instantaneous; requires another update.
✓
Blue/green deployment
Why this is correct
Correct: blue/green allows instant rollback by switching traffic back to the old version.
Related concept
Read the scenario before looking for a memorised answer.
✓
Canary deployment
Why this is correct
Correct: canary deployments allow gradual traffic shifting and easy rollback if issues are detected.
Related concept
Read the scenario before looking for a memorised answer.
✗
A/B testing deployment
Why it's wrong here
Incorrect: A/B testing is for feature comparison, not a deployment strategy with zero downtime and rollback.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Identify which PCA 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.
Manage implementation of cloud architecture — This question tests Manage implementation of cloud architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Blue/green deployment — Blue/green deployment (A) and canary deployment (C) are two strategies that provide zero downtime and quick rollback. Blue/green deploys new version to a separate environment and switches traffic; canary gradually shifts traffic and allows easy rollback. Rolling update (B) also provides zero downtime but rollback requires a new update, not immediate. Shadow deployment (D) mirrors traffic for analysis but doesn't serve users. A/B testing (E) is a method for comparing features but not a deployment strategy.
What should I do if I get this PCA question wrong?
Identify which PCA 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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Question Discussion
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