Google PCA Ensure solution and operations reliability Practice Question
This PCA practice question tests your understanding of ensure solution and operations reliability. 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 company runs a containerized application on Cloud Run. Which TWO actions will most improve the reliability of the service?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy the service in multiple regions
Setting min instances > 0 prevents cold starts, ensuring consistent performance. Deploying in multiple regions provides regional failover. Enabling CPU always allocated is for background tasks, not reliability. Disabling concurrency limits throughput. Cloud CDN is for static content, not compute reliability.
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.
✗
Enable CPU always allocated
Why it's wrong here
CPU always allocated is useful for background processing but does not directly improve reliability; it increases cost.
✗
Disable concurrency
Why it's wrong here
Disabling concurrency limits the number of concurrent requests per instance, reducing throughput and potentially causing queuing.
✓
Deploy the service in multiple regions
Why this is correct
Multi-region deployment provides high availability and failover if one region becomes unavailable.
Related concept
Read the scenario before looking for a memorised answer.
✓
Set min instances to at least 1
Why this is correct
Min instances > 0 keeps at least one instance warm, reducing cold starts and improving response consistency.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Cloud CDN
Why it's wrong here
Cloud CDN caches static content; it does not improve reliability of the compute service itself.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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.
Ensure solution and operations reliability — This question tests Ensure solution and operations reliability — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy the service in multiple regions — Setting min instances > 0 prevents cold starts, ensuring consistent performance. Deploying in multiple regions provides regional failover. Enabling CPU always allocated is for background tasks, not reliability. Disabling concurrency limits throughput. Cloud CDN is for static content, not compute reliability.
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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