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Application Environment, Configuration and Security →hardMultiple ChoiceObjective-mapped

CKAD Practice Question: Application Environment, Configuration and Security

This CKAD practice question tests your understanding of application environment, configuration and security. 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.

Exhibit

Refer to the exhibit.

```
apiVersion: v1
kind: Pod
metadata:
  name: secured-pod
spec:
  containers:
  - name: app
    image: nginx
    securityContext:
      runAsUser: 1000
      runAsGroup: 2000
      capabilities:
        add: ["NET_ADMIN"]
        drop: ["ALL"]
  securityContext:
    runAsNonRoot: true
```

Refer to the exhibit. A Pod is defined with security contexts at both the container and Pod level. Which of the following statements accurately describes the effective security configuration?

Question 1hardmultiple choice
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Exhibit

Refer to the exhibit.

```
apiVersion: v1
kind: Pod
metadata:
  name: secured-pod
spec:
  containers:
  - name: app
    image: nginx
    securityContext:
      runAsUser: 1000
      runAsGroup: 2000
      capabilities:
        add: ["NET_ADMIN"]
        drop: ["ALL"]
  securityContext:
    runAsNonRoot: true
```

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 container runs as user 1000, group 2000, with NET_ADMIN capability added, and the Pod-level runAsNonRoot: true is also enforced.

Option C is correct because Kubernetes merges Pod-level and container-level security contexts, with the container-level settings taking precedence for fields that overlap, but Pod-level settings that are not overridden (like runAsNonRoot) remain enforced. In this case, the container runs as user 1000, group 2000, with NET_ADMIN capability added, and the Pod-level runAsNonRoot: true is also enforced, ensuring the container does not run as root.

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 Pod will fail to start because runAsNonRoot conflicts with the container's runAsUser.

    Why it's wrong here

    runAsNonRoot: true only requires that the container user is not 0, which is satisfied by user 1000.

  • ✗

    The container runs as user 1000, but the Pod-level runAsNonRoot overrides the container's runAsUser to enforce non-root.

    Why it's wrong here

    Pod-level runAsNonRoot does not override container runAsUser; both must be satisfied.

  • ✓

    The container runs as user 1000, group 2000, with NET_ADMIN capability added, and the Pod-level runAsNonRoot: true is also enforced.

    Why this is correct

    Container-level securityContext merges with Pod-level, but Pod-level runAsNonRoot is an additional constraint.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The container runs as root because the Pod-level runAsNonRoot is ignored when container-level capabilities are set.

    Why it's wrong here

    Pod-level runAsNonRoot is not ignored; it is a separate constraint.

Common exam traps

Common exam trap: answer the scenario, not the keyword

CNCF often tests the misconception that Pod-level runAsNonRoot overrides container-level runAsUser, when in fact they are complementary checks, and the container's runAsUser must be non-root for the Pod to start.

Detailed technical explanation

How to think about this question

Under the hood, Kubernetes security contexts are applied in a layered manner: Pod-level settings act as defaults for all containers, but container-level settings override Pod-level settings for the same field (e.g., runAsUser, runAsGroup). However, fields like runAsNonRoot are not overridden by container-level settings; they are validated at runtime by the kubelet, which checks that the container's effective UID is not 0. This behavior is defined in the Kubernetes security context documentation and is critical for Pod Security Standards (PSS), especially in restricted profiles where runAsNonRoot is required.

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 practitioner preparing for the CKAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

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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FAQ

Questions learners often ask

What does this CKAD question test?

Application Environment, Configuration and Security — This question tests Application Environment, Configuration and Security — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The container runs as user 1000, group 2000, with NET_ADMIN capability added, and the Pod-level runAsNonRoot: true is also enforced. — Option C is correct because Kubernetes merges Pod-level and container-level security contexts, with the container-level settings taking precedence for fields that overlap, but Pod-level settings that are not overridden (like runAsNonRoot) remain enforced. In this case, the container runs as user 1000, group 2000, with NET_ADMIN capability added, and the Pod-level runAsNonRoot: true is also enforced, ensuring the container does not run as root.

What should I do if I get this CKAD 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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Last reviewed: Jun 30, 2026

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This CKAD practice question is part of Courseiva's free CNCF 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 CKAD exam.