- A
Custom DNS must be configured via Cloud DNS.
Why wrong: Cloud DNS can override but is not required for default internal resolution.
- B
The VPC must have Private Google Access enabled.
Why wrong: Private Google Access is for accessing Google APIs, not for internal DNS.
- C
The instances must be in the same zone and VPC network.
Internal DNS resolves short names only for instances in the same zone and network.
- D
The instance must have a network tag 'dns-enabled'.
Why wrong: Tags are not required for DNS resolution.
Question 138 of 1,000
PCNE Implementing VPC Instances Practice Question
This PCNE practice question tests your understanding of implementing vpc instances. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your VPC has instances with internal DNS names like 'instance1.us-central1-a.c.myproject.internal'. You need to ensure that DNS resolution works for instances in the same zone using short names (e.g., 'instance1'). Which condition must be met?
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 instances must be in the same zone and VPC network.
Google Cloud internal DNS automatically resolves short names for instances within the same zone and network. The instance must be in the same zone and VPC network. No additional configuration is needed as long as instances are in the same zone.
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.
- ✗
Custom DNS must be configured via Cloud DNS.
Why it's wrong here
Cloud DNS can override but is not required for default internal resolution.
- ✗
The VPC must have Private Google Access enabled.
Why it's wrong here
Private Google Access is for accessing Google APIs, not for internal DNS.
- ✓
The instances must be in the same zone and VPC network.
Why this is correct
Internal DNS resolves short names only for instances in the same zone and network.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The instance must have a network tag 'dns-enabled'.
Why it's wrong here
Tags are not required for DNS resolution.
Common exam traps
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.
Detailed technical explanation
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.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which PCNE 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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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing VPC Instances — This question tests Implementing VPC Instances — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The instances must be in the same zone and VPC network. — Google Cloud internal DNS automatically resolves short names for instances within the same zone and network. The instance must be in the same zone and VPC network. No additional configuration is needed as long as instances are in the same zone.
What should I do if I get this PCNE question wrong?
Identify which PCNE 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This PCNE 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 PCNE exam.
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