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 fields are part of a Pod's securityContext that can restrict container capabilities? (Choose three.)
capabilities.drop
Correct.
seccompProfile
Why wrong: Seccomp is a separate security mechanism, not capabilities.
allowPrivilegeEscalation
Why wrong: This controls whether privilege escalation is allowed, but is not directly about capabilities.
capabilities.add
Correct.
runAsUser
Why wrong: This sets the user ID, not capabilities.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
capabilities.drop
Option A is correct because `capabilities.drop` in a Pod's `securityContext` explicitly removes Linux capabilities from all containers in the Pod, thereby restricting what privileged operations they can perform. This is a key mechanism for adhering to the principle of least privilege by dropping capabilities such as `NET_RAW` or `SYS_ADMIN` that are not needed.
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.
capabilities.drop
Why this is correct
Correct.
Related concept
Read the scenario before looking for a memorised answer.
seccompProfile
Why it's wrong here
Seccomp is a separate security mechanism, not capabilities.
allowPrivilegeEscalation
Why it's wrong here
This controls whether privilege escalation is allowed, but is not directly about capabilities.
capabilities.add
Why this is correct
Correct.
Related concept
Read the scenario before looking for a memorised answer.
runAsUser
Why it's wrong here
This sets the user ID, not capabilities.
Common exam traps
CNCF often tests the distinction between capability management (`capabilities.drop`/`capabilities.add`) and other security context fields like `seccompProfile` or `runAsUser`, so candidates mistakenly think any security-related field can restrict capabilities.
Detailed technical explanation
Linux capabilities break down the privileges of the root user into distinct units (e.g., `CAP_NET_BIND_SERVICE`, `CAP_SYS_TIME`), and the `capabilities.drop` field removes specific capabilities from the container's bounding set, ensuring they cannot be used even if the container runs as root. Under the hood, this translates to the `cap_bset` and `cap_effective` sets being modified via the `prctl()` system call, and it is a common practice to drop all capabilities and then add only those required (e.g., `capabilities.add` for `NET_ADMIN`).
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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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: capabilities.drop — Option A is correct because `capabilities.drop` in a Pod's `securityContext` explicitly removes Linux capabilities from all containers in the Pod, thereby restricting what privileged operations they can perform. This is a key mechanism for adhering to the principle of least privilege by dropping capabilities such as `NET_RAW` or `SYS_ADMIN` that are not needed.
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.
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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.
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