Google ACE Configuring access and security Practice Question
This ACE practice question tests your understanding of configuring access and security. 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.
A company uses VPC Service Controls to protect Cloud Storage. They have a service perimeter that includes the storage API and the project where the stored data resides. Users inside the perimeter can access the data, but users outside cannot. However, a group of users outside the perimeter are able to access the data using a signed URL generated by a service inside the perimeter. Why does this happen?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
VPC Service Controls do not apply to signed URLs.
VPC Service Controls are designed to restrict access to Google Cloud resources based on the network origin of requests, but they do not evaluate or block requests made using signed URLs. Signed URLs are authenticated via cryptographic signatures, not IAM or network context, so they bypass the perimeter check entirely. This is by design, as signed URLs are intended for temporary, out-of-band access.
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.
✓
VPC Service Controls do not apply to signed URLs.
Why this is correct
Signed URLs are a separate access method not governed by VPC SC.
Related concept
Read the scenario before looking for a memorised answer.
✗
Signed URLs bypass VPC Service Controls.
Why it's wrong here
While true, the official explanation is that VPC SC does not apply to signed URLs.
✗
The service perimeter is misconfigured, missing signed URL restrictions.
Why it's wrong here
There is no configuration to block signed URLs within VPC SC.
✗
The users have been granted IAM roles that override the perimeter.
Why it's wrong here
IAM roles cannot override VPC SC when the perimeter is in effect.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that VPC Service Controls are a universal access control mechanism, when in fact they do not apply to signed URLs or public buckets, leading candidates to incorrectly assume a misconfiguration or override.
Detailed technical explanation
How to think about this question
Signed URLs use a cryptographic key (typically a service account key) to generate a query parameter signature that is validated by Cloud Storage. VPC Service Controls operate at the network layer by inspecting the X-Forwarded-For header or the originating IP, but signed URL requests are authenticated via the signature in the URL, not by the requester's identity or network. This means that even if a request comes from an IP outside the perimeter, the signature is valid, and the request is allowed. In practice, this is a common pattern for granting temporary access to external partners or for serving content to users without Google Cloud credentials.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this ACE question in full detail.
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: VPC Service Controls do not apply to signed URLs. — VPC Service Controls are designed to restrict access to Google Cloud resources based on the network origin of requests, but they do not evaluate or block requests made using signed URLs. Signed URLs are authenticated via cryptographic signatures, not IAM or network context, so they bypass the perimeter check entirely. This is by design, as signed URLs are intended for temporary, out-of-band access.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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