The answer is the analyst only has the roles/bigquery.metadataviewer role, which does not allow reading table data. This role grants permissions to view metadata like table names, schemas, and dataset properties, but critically lacks the bigquery.tables.getData permission required to execute a SELECT query and access the actual rows. On the Google Professional Data Engineer exam, this distinction between BigQuery IAM metadata viewer vs data access permissions is a classic trap—candidates often assume that being able to see a table’s schema means they can query it. The exam tests your understanding that metadata roles are for discovery and governance, not for data reading. A common memory tip: “Metadata lets you see the menu, but you need data access to eat the meal.”
PDE Practice Question: Building and operationalizing data processing systems
This PDE practice question tests your understanding of building and operationalizing data processing systems. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. A BigQuery dataset has the IAM policy shown above. An analyst is trying to run a SELECT query on a table in this dataset but receives an 'Access Denied' error. What is the most likely reason?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The analyst only has the roles/bigquery.metadataviewer role, which does not allow reading table data.
The roles/bigquery.metadataviewer role grants permissions to view table and dataset metadata (e.g., table names, schemas) but does not include the bigquery.tables.getData permission required to read table rows. Therefore, when the analyst runs a SELECT query, BigQuery denies access because the role lacks the data-reading privilege. This is the most likely reason for the 'Access Denied' error.
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 analyst does not have permission to list datasets in the project.
Why it's wrong here
A is wrong because the metadataviewer role allows listing datasets.
✓
The analyst only has the roles/bigquery.metadataviewer role, which does not allow reading table data.
Why this is correct
D is correct because metadataviewer only allows viewing metadata, not querying data.
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 table is in a different region than the dataset, and the analyst's query is not cross-region compatible.
Why it's wrong here
C is an unlikely cause for an access denied error; cross-region errors are different.
✗
The analyst has not been granted the 'bigquery.jobs.create' permission to run queries.
Why it's wrong here
B is wrong because the dataViewer role includes jobs.create.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between metadata-viewing roles and data-reading roles, trapping candidates who assume that being able to see table names and schemas implies permission to query the data.
Detailed technical explanation
How to think about this question
Under the hood, BigQuery IAM permissions are evaluated at multiple levels: project, dataset, and table. The roles/bigquery.metadataviewer role includes permissions like bigquery.tables.get and bigquery.tables.list, but explicitly excludes bigquery.tables.getData. When a SELECT query is executed, BigQuery checks for bigquery.tables.getData on the target table; without it, the query fails even if the analyst can see the table schema. This is a common pitfall when granting minimal metadata access for data cataloging without allowing actual data reads.
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
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Building and operationalizing data processing systems — This question tests Building and operationalizing data processing systems — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The analyst only has the roles/bigquery.metadataviewer role, which does not allow reading table data. — The roles/bigquery.metadataviewer role grants permissions to view table and dataset metadata (e.g., table names, schemas) but does not include the bigquery.tables.getData permission required to read table rows. Therefore, when the analyst runs a SELECT query, BigQuery denies access because the role lacks the data-reading privilege. This is the most likely reason for the 'Access Denied' error.
What should I do if I get this PDE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
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 →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PDE 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 PDE exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.