- A
The Artifact Registry repository is in a different region than the private pool
Why wrong: Regional mismatch might affect performance but not cause timeout; private pools can access any region with proper networking.
- B
The image name contains a typo
Why wrong: Typo would cause image not found error, not timeout.
- C
The Cloud Build service account lacks permissions to pull images from Artifact Registry
Why wrong: Permission errors would give access denied, not timeout.
- D
The private pool is not peered with the VPC that contains Artifact Registry
Private pools require VPC peering to access resources in the VPC; without it, network timeout occurs.
Question 878 of 1,000
PCDE Practice Question: Building and Implementing CI/CD Pipelines for a Service
This PCDE practice question tests your understanding of building and implementing ci/cd pipelines for a service. 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 team uses Cloud Build with a private pool to access resources in a VPC. After configuring the private pool, builds fail with a timeout error when pulling images from Artifact Registry. 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.
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
✓
The private pool is not peered with the VPC that contains Artifact Registry
When using a Cloud Build private pool, the pool runs in a Google-managed environment that must be peered with your VPC to access internal resources. If the private pool is not peered with the VPC that contains Artifact Registry (which is a regional service accessible via Private Service Connect or VPC peering), the build worker cannot reach the Artifact Registry API endpoint over the private network, causing a timeout when pulling images. Option D directly addresses this missing network connectivity.
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 Artifact Registry repository is in a different region than the private pool
Why it's wrong here
Regional mismatch might affect performance but not cause timeout; private pools can access any region with proper networking.
- ✗
The image name contains a typo
Why it's wrong here
Typo would cause image not found error, not timeout.
- ✗
The Cloud Build service account lacks permissions to pull images from Artifact Registry
Why it's wrong here
Permission errors would give access denied, not timeout.
- ✓
The private pool is not peered with the VPC that contains Artifact Registry
Why this is correct
Private pools require VPC peering to access resources in the VPC; without it, network timeout occurs.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between permission errors (which produce explicit denial messages) and network connectivity errors (which produce timeouts), tempting candidates to select IAM-related options when the symptom is a timeout.
Detailed technical explanation
How to think about this question
Cloud Build private pools use VPC Service Controls and Private Service Connect to route traffic through your VPC. For Artifact Registry, the default DNS resolution points to a public IP; without proper VPC peering or Private Service Connect endpoints, the build worker cannot resolve or reach the private IP of the Artifact Registry API, leading to TCP connection timeouts (typically after 30–60 seconds). This is distinct from public pool builds, which use Google's backbone and don't require VPC peering.
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.
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Building and Implementing CI/CD Pipelines for a Service — study guide chapter
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FAQ
Questions learners often ask
What does this PCDE question test?
Building and Implementing CI/CD Pipelines for a Service — This question tests Building and Implementing CI/CD Pipelines for a Service — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The private pool is not peered with the VPC that contains Artifact Registry — When using a Cloud Build private pool, the pool runs in a Google-managed environment that must be peered with your VPC to access internal resources. If the private pool is not peered with the VPC that contains Artifact Registry (which is a regional service accessible via Private Service Connect or VPC peering), the build worker cannot reach the Artifact Registry API endpoint over the private network, causing a timeout when pulling images. Option D directly addresses this missing network connectivity.
What should I do if I get this PCDE 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
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Last reviewed: Jul 4, 2026
This PCDE 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 PCDE exam.
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