- A
Enable CPU always allocated
Why wrong: CPU always allocated is useful for background processing but does not directly improve reliability; it increases cost.
- B
Disable concurrency
Why wrong: Disabling concurrency limits the number of concurrent requests per instance, reducing throughput and potentially causing queuing.
- C
Deploy the service in multiple regions
Multi-region deployment provides high availability and failover if one region becomes unavailable.
- D
Set min instances to at least 1
Min instances > 0 keeps at least one instance warm, reducing cold starts and improving response consistency.
- E
Use Cloud CDN
Why wrong: Cloud CDN caches static content; it does not improve reliability of the compute service itself.
Question 334 of 1,000
Google PCA Ensure solution and operations reliability Practice Question
This PCA practice question tests your understanding of ensure solution and operations reliability. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 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
✓
Deploy the service in multiple regions
Deploying the service in multiple regions (Option C) improves reliability by distributing traffic across geographically separate Cloud Run instances, so if one region fails, traffic can be routed to healthy regions via a global load balancer. Setting min instances to at least 1 (Option D) prevents cold starts and ensures that at least one container instance is always running, reducing latency spikes and avoiding request failures during scale-from-zero events.
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
A common mistake is confusing operational tuning settings (like disabling concurrency or enabling CPU always allocated) with mechanisms that improve reliability; these settings address performance or cost, not availability.
Detailed technical explanation
How to think about this question
Cloud Run automatically scales instances based on incoming requests, and setting min instances to 1 keeps a baseline of warm containers, eliminating the cold start latency that can cause initial request timeouts (often 10–30 seconds for new instances). Multi-region deployment relies on a global external HTTP(S) load balancer with backend services pointing to Cloud Run in each region; health checks and failover are managed by the load balancer, which can route traffic away from unhealthy regions within seconds.
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
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this PCA question test?
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 — Deploying the service in multiple regions (Option C) improves reliability by distributing traffic across geographically separate Cloud Run instances, so if one region fails, traffic can be routed to healthy regions via a global load balancer. Setting min instances to at least 1 (Option D) prevents cold starts and ensures that at least one container instance is always running, reducing latency spikes and avoiding request failures during scale-from-zero events.
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.
About these practice questions
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Last reviewed: Jul 4, 2026
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.
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