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ACE Practice Question: A developer reports that a Cloud Function is…
This ACE practice question tests your understanding of a developer reports that a cloud function is…. 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 developer reports that a Cloud Function is failing with '403 Forbidden' when calling the BigQuery API. The function's service account has the BigQuery Data Viewer role. What is a likely additional requirement that may be missing?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
The service account needs the BigQuery Admin role instead of Data Viewer to make API calls
BigQuery Data Viewer is sufficient for read operations. The issue is not role scope — it's more likely the API is not enabled.
B
Distractor review
Cloud Functions cannot call BigQuery — it must use Dataflow or BigQuery scheduled queries instead
Cloud Functions can call BigQuery API directly using client libraries — they're frequently used together for data processing workflows.
C
Best answer
The BigQuery API may not be enabled in the Cloud Functions' project
Even with the correct IAM role, API calls fail if the target API isn't enabled. Enabling the BigQuery API (`bigquery.googleapis.com`) in the project is a prerequisite.
D
Distractor review
The Cloud Function must be deployed in the same region as the BigQuery dataset
BigQuery is a global service — Cloud Functions can call BigQuery APIs regardless of region.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
Related ACE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 3
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Question 4
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Question 5
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Question 6
A startup creates its first Google Cloud project. Before deploying any paid resources, what must be linked to the project?
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FAQ
Questions learners often ask
What does this ACE question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: The BigQuery API may not be enabled in the Cloud Functions' project — For Cloud Functions to call BigQuery, both the BigQuery API must be enabled in the project AND the service account must have appropriate IAM roles. Additionally, if BigQuery is in a different project, the service account needs access in that project. However, a common oversight is that the BigQuery API itself may not be enabled in the Cloud Functions project.
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.
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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.