- A
A backend service with outlier detection enabled
Why wrong: Outlier detection evicts unhealthy hosts, not fault injection.
- B
A network endpoint group with a health check that fails intermittently
Why wrong: Health checks do not inject delays; they mark instances unhealthy.
- C
A traffic splitting rule in the routing configuration
Why wrong: Traffic splitting distributes traffic percentage, not fault injection.
- D
A fault injection policy in the TrafficDirectorRoute
Correct: Traffic Director allows fault injection via route rules in the routing configuration.
Question 15 of 1,000
PCNE Configuring Network Services Practice Question
This PCNE practice question tests your understanding of configuring network services. 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.
An organization uses Traffic Director with Envoy sidecars in GKE. They want to implement fault injection to test service resilience by injecting a 5-second delay into 10% of requests to a specific backend service. Which Traffic Director configuration resource should they use?
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
✓
A fault injection policy in the TrafficDirectorRoute
Traffic Director supports fault injection via the Envoy HTTP connection manager. The correct approach is to configure a TrafficDirectorRoute with a fault injection policy, which is part of the routing configuration.
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.
- ✗
A backend service with outlier detection enabled
Why it's wrong here
Outlier detection evicts unhealthy hosts, not fault injection.
- ✗
A network endpoint group with a health check that fails intermittently
Why it's wrong here
Health checks do not inject delays; they mark instances unhealthy.
- ✗
A traffic splitting rule in the routing configuration
Why it's wrong here
Traffic splitting distributes traffic percentage, not fault injection.
- ✓
A fault injection policy in the TrafficDirectorRoute
Why this is correct
Correct: Traffic Director allows fault injection via route rules in the routing configuration.
Related concept
Read the scenario before looking for a memorised answer.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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.
- →
Configuring Network Services — study guide chapter
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FAQ
Questions learners often ask
What does this PCNE question test?
Configuring Network Services — This question tests Configuring Network Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A fault injection policy in the TrafficDirectorRoute — Traffic Director supports fault injection via the Envoy HTTP connection manager. The correct approach is to configure a TrafficDirectorRoute with a fault injection policy, which is part of the routing configuration.
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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