This CKAD practice question tests your understanding of application environment, configuration and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which THREE of the following are valid fields in a PodSecurityContext (pod-level securityContext)? (Select 3)
runAsUser
Valid at pod level; sets the user for all containers.
fsGroup
Valid at pod level; sets the group for volumes.
readOnlyRootFilesystem
Why wrong: This is a container-level setting, not pod-level.
capabilities
Why wrong: Capabilities are defined at container level only.
seccompProfile
Valid at pod level since Kubernetes 1.19.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
runAsUser
Option A is correct because `runAsUser` is a valid field in a PodSecurityContext that sets the user ID (UID) for all containers in the pod, overriding any container-level `securityContext.runAsUser`. This is defined in the Kubernetes API under `PodSecurityContext` and is commonly used to enforce non-root execution.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
runAsUser
Why this is correct
Valid at pod level; sets the user for all containers.
Related concept
Read the scenario before looking for a memorised answer.
fsGroup
Why this is correct
Valid at pod level; sets the group for volumes.
Related concept
Read the scenario before looking for a memorised answer.
readOnlyRootFilesystem
Why it's wrong here
This is a container-level setting, not pod-level.
capabilities
Why it's wrong here
Capabilities are defined at container level only.
seccompProfile
Why this is correct
Valid at pod level since Kubernetes 1.19.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
CNCF often tests the distinction between pod-level and container-level securityContext fields, and the trap here is that candidates confuse `readOnlyRootFilesystem` and `capabilities` as pod-level fields when they are actually only valid at the container level.
Detailed technical explanation
The PodSecurityContext applies security settings to all containers in the pod, but certain fields like `runAsUser`, `fsGroup`, and `seccompProfile` are valid at the pod level, while others like `capabilities` and `readOnlyRootFilesystem` are restricted to the container level due to their per-process nature. For example, `fsGroup` changes the group ownership of volumes, which is a pod-level operation, whereas `capabilities` modify kernel-level permissions per container. In practice, setting `seccompProfile` at the pod level applies the same seccomp profile to all containers, which is useful for enforcing system call restrictions across the entire pod.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Application Environment, Configuration and Security — study guide chapter
Learn the concepts, then practise the questions
Application Environment, Configuration and Security practice questions
Targeted practice on this topic area only
All CKAD questions
991 questions across all exam domains
Certified Kubernetes Application Developer CKAD study guide
Full concept coverage aligned to exam objectives
CKAD practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise CKAD questions linked to Application Design and Build.
Practise CKAD questions linked to Application Deployment.
Practise CKAD questions linked to Application Environment, Configuration and Security.
Practise CKAD questions linked to Application Observability and Maintenance.
Practise CKAD questions linked to Services and Networking.
Practise CKAD questions linked to CKAD fundamentals.
Practise CKAD questions linked to CKAD scenario.
Practise CKAD questions linked to CKAD troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Application Environment, Configuration and Security — This question tests Application Environment, Configuration and Security — Read the scenario before looking for a memorised answer..
The correct answer is: runAsUser — Option A is correct because `runAsUser` is a valid field in a PodSecurityContext that sets the user ID (UID) for all containers in the pod, overriding any container-level `securityContext.runAsUser`. This is defined in the Kubernetes API under `PodSecurityContext` and is commonly used to enforce non-root execution.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 30, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.