- A
Check the subscription's backlog in the Pub/Sub console or via gcloud pubsub subscriptions describe
Backlog indicates how many unacknowledged messages are pending.
- B
Use Cloud Monitoring Metrics Explorer to view the subscription's backlog and ack messages count
Monitoring metrics help understand the rate of messages vs acknowledgments.
- C
Use Cloud Trace to analyze the latency of each Pub/Sub message
Why wrong: Cloud Trace is not integrated with Pub/Sub directly; it's for HTTP-based services.
- D
Use Cloud Debugger to inspect the subscriber code
Why wrong: Debugger is for live code debugging, not for Pub/Sub performance.
- E
Use Cloud Logging to check for subscriber errors or delivery failures
Logs can show errors in message processing.
Question 349 of 1,000
Google ACE Practice Question: Ensuring Successful Operation of a Cloud Solution
This ACE practice question tests your understanding of ensuring successful operation of a cloud solution. 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.
You are troubleshooting a slow Pub/Sub subscription. Which three steps should you take to diagnose the issue? (Choose three.)
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
✓
Check the subscription's backlog in the Pub/Sub console or via gcloud pubsub subscriptions describe
Cloud Monitoring (Metrics Explorer) can show subscription backlog, Cloud Logging can show subscriber errors, and checking the subscription's backlog via gcloud or console helps assess the issue. Cloud Trace is for HTTP-based services, not Pub/Sub directly. Cloud Debugger is for code debugging, not Pub/Sub monitoring.
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.
- ✓
Check the subscription's backlog in the Pub/Sub console or via gcloud pubsub subscriptions describe
Why this is correct
Backlog indicates how many unacknowledged messages are pending.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use Cloud Monitoring Metrics Explorer to view the subscription's backlog and ack messages count
Why this is correct
Monitoring metrics help understand the rate of messages vs acknowledgments.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Cloud Trace to analyze the latency of each Pub/Sub message
Why it's wrong here
Cloud Trace is not integrated with Pub/Sub directly; it's for HTTP-based services.
- ✗
Use Cloud Debugger to inspect the subscriber code
Why it's wrong here
Debugger is for live code debugging, not for Pub/Sub performance.
- ✓
Use Cloud Logging to check for subscriber errors or delivery failures
Why this is correct
Logs can show errors in message processing.
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 ACE 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.
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Ensuring Successful Operation of a Cloud Solution — study guide chapter
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FAQ
Questions learners often ask
What does this ACE question test?
Ensuring Successful Operation of a Cloud Solution — This question tests Ensuring Successful Operation of a Cloud Solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the subscription's backlog in the Pub/Sub console or via gcloud pubsub subscriptions describe — Cloud Monitoring (Metrics Explorer) can show subscription backlog, Cloud Logging can show subscriber errors, and checking the subscription's backlog via gcloud or console helps assess the issue. Cloud Trace is for HTTP-based services, not Pub/Sub directly. Cloud Debugger is for code debugging, not Pub/Sub monitoring.
What should I do if I get this ACE question wrong?
Identify which ACE 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This ACE 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 ACE exam.
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