- A
They record authentication events; they are disabled by default due to privacy regulations.
Why wrong: Authentication events are not the primary purpose of Data Access audit logs. Privacy is not the reason for their default-off status — cost is.
- B
They log API calls that read or write user data; they are off by default due to very high log volume and associated storage costs.
Data Access logs capture every data read/write. On busy services like BigQuery, this generates massive log volume. Enabling them broadly would be cost-prohibitive, so they're opt-in.
- C
They log VM instance creation and deletion; they are disabled by default to avoid noise.
Why wrong: VM lifecycle events are captured in Admin Activity audit logs (always enabled), not Data Access logs.
- D
They provide real-time threat detection; they are experimental and not yet generally available.
Why wrong: Data Access audit logs are GA and are for compliance/audit purposes, not real-time threat detection (that's Security Command Center's role).
Quick Answer
The answer is that Data Access audit logs are disabled by default because they record every API call that reads or writes user data, generating an enormous volume of logs that can quickly lead to high storage costs in Cloud Logging. These logs capture granular operations like reading a Cloud Storage object or updating a BigQuery table, and the sheer frequency of such calls across a project can produce terabytes of data daily. On the Google Associate Cloud Engineer exam, this concept tests your understanding of cost-conscious security design—a common trap is assuming all audit logs are enabled by default, when in fact only Admin Activity logs are always on. Remember that Data Access logs must be explicitly enabled per service or resource to control both cost and retention. A helpful memory tip: think of Data Access logs as the “fine print” of your cloud activity—useful but expensive to store, so you only turn them on when you need detailed forensic visibility.
Google ACE Configuring access and security Practice Question
This ACE practice question tests your understanding of configuring access and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
What is the purpose of Cloud Audit Logs' Data Access audit logs, and why are they NOT enabled by default for most services?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"NOT"Why it matters: Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
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
They log API calls that read or write user data; they are off by default due to very high log volume and associated storage costs.
Data Access audit logs record every API call that reads or writes user-provided data (e.g., reading a Cloud Storage object or updating a BigQuery table). They are disabled by default because the sheer volume of these operations can generate terabytes of logs per day, leading to significant Cloud Logging storage costs and potential budget overruns. Administrators must explicitly enable them per service or per resource to control cost and log retention.
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.
- ✗
They record authentication events; they are disabled by default due to privacy regulations.
Why it's wrong here
Authentication events are not the primary purpose of Data Access audit logs. Privacy is not the reason for their default-off status — cost is.
- ✓
They log API calls that read or write user data; they are off by default due to very high log volume and associated storage costs.
Why this is correct
Data Access logs capture every data read/write. On busy services like BigQuery, this generates massive log volume. Enabling them broadly would be cost-prohibitive, so they're opt-in.
Clue confirmation
The clue word "NOT" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
They log VM instance creation and deletion; they are disabled by default to avoid noise.
Why it's wrong here
VM lifecycle events are captured in Admin Activity audit logs (always enabled), not Data Access logs.
- ✗
They provide real-time threat detection; they are experimental and not yet generally available.
Why it's wrong here
Data Access audit logs are GA and are for compliance/audit purposes, not real-time threat detection (that's Security Command Center's role).
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that Data Access logs are enabled by default for all services, when in fact they are off by default specifically to prevent runaway storage costs from high-volume user data operations.
Trap categories for this question
Command / output trap
Data Access audit logs are GA and are for compliance/audit purposes, not real-time threat detection (that's Security Command Center's role).
Detailed technical explanation
How to think about this question
Under the hood, Data Access logs capture RESTful API calls at the resource level (e.g., `storage.objects.get` or `bigquery.tables.get`), and each log entry includes the caller identity, source IP, and request parameters. A subtle behavior is that even if you enable Data Access logs for a service, you must also grant the `roles/logging.viewer` role to users who need to view them, and logs are subject to the 30-day default retention unless you configure custom retention or export to BigQuery. In a real-world scenario, a large e-commerce platform enabling Data Access logs for Cloud Storage without cost controls could see monthly logging costs exceed $10,000 due to millions of read requests per hour.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
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Configuring access and security — study guide chapter
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FAQ
Questions learners often ask
What does this ACE question test?
Configuring access and security — This question tests Configuring access and security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: They log API calls that read or write user data; they are off by default due to very high log volume and associated storage costs. — Data Access audit logs record every API call that reads or writes user-provided data (e.g., reading a Cloud Storage object or updating a BigQuery table). They are disabled by default because the sheer volume of these operations can generate terabytes of logs per day, leading to significant Cloud Logging storage costs and potential budget overruns. Administrators must explicitly enable them per service or per resource to control cost and log retention.
What should I do if I get this ACE 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: "NOT". Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
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: Jun 30, 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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