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. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Exhibit
Refer to the exhibit.
```
{
"textPayload": "The request failed because the instance 'my-service-abc' is not ready. The instance is being started.",
"resource": {
"type": "cloud_run_revision",
"labels": {
"service_name": "my-service",
"revision_name": "my-service-00001-zuv"
}
}
}
```
A developer reports that a Cloud Run service is returning 503 errors intermittently. Based on the log entry, what is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Refer to the exhibit.
```
{
"textPayload": "The request failed because the instance 'my-service-abc' is not ready. The instance is being started.",
"resource": {
"type": "cloud_run_revision",
"labels": {
"service_name": "my-service",
"revision_name": "my-service-00001-zuv"
}
}
}
```
A
The service has too few max instances configured.
Why wrong: Too few max instances would cause requests to queue, not a 'being started' message in logs.
B
The revision has been deleted.
Why wrong: If the revision were deleted, requests would fail with a different error, not a startup message.
C
The service's CPU throttling is too aggressive.
Why wrong: CPU throttling would cause performance degradation, not a 'not ready' startup log.
D
The service is experiencing cold starts with high latency.
The log directly states the instance is being started, which is typical of cold starts in Cloud Run.
E
The container image has a bug that prevents it from starting quickly.
Why wrong: A container bug would likely cause startup failures or crashes, not a 'being started' message.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The service is experiencing cold starts with high latency.
The log indicates the instance is not ready and is being started, which is characteristic of a cold start. Cold starts occur when a new instance is created to handle incoming requests, causing a startup delay. Too few max instances (A) would lead to request queuing, not necessarily startup logs. A container bug (B) would show different errors. A deleted revision (D) would show a different error. CPU throttling (E) would not cause a 'being started' message.
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.
✗
The service has too few max instances configured.
Why it's wrong here
Too few max instances would cause requests to queue, not a 'being started' message in logs.
✗
The revision has been deleted.
Why it's wrong here
If the revision were deleted, requests would fail with a different error, not a startup message.
✗
The service's CPU throttling is too aggressive.
Why it's wrong here
CPU throttling would cause performance degradation, not a 'not ready' startup log.
✓
The service is experiencing cold starts with high latency.
Why this is correct
The log directly states the instance is being started, which is typical of cold starts in Cloud Run.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The container image has a bug that prevents it from starting quickly.
Why it's wrong here
A container bug would likely cause startup failures or crashes, not a 'being started' message.
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 ACE question in full detail.
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.
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: The service is experiencing cold starts with high latency. — The log indicates the instance is not ready and is being started, which is characteristic of a cold start. Cold starts occur when a new instance is created to handle incoming requests, causing a startup delay. Too few max instances (A) would lead to request queuing, not necessarily startup logs. A container bug (B) would show different errors. A deleted revision (D) would show a different error. CPU throttling (E) would not cause a 'being started' message.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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