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.
A Pod specification includes: securityContext: { seccompProfile: { type: RuntimeDefault } }. What does this configuration do?
It disables seccomp for the pod
Why wrong: RuntimeDefault enables a profile, it does not disable.
It applies the container runtime's default seccomp profile
RuntimeDefault uses the runtime's default, which is usually a restricted profile.
It allows all syscalls
Why wrong: Unconfined allows all; RuntimeDefault restricts.
It uses a custom seccomp profile from a file
Why wrong: Localhost would be used for a custom profile.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
It applies the container runtime's default seccomp profile
Setting `seccompProfile.type: RuntimeDefault` in the Pod's securityContext instructs the container runtime (e.g., containerd or CRI-O) to apply its own default seccomp profile to the container. This default profile restricts system calls to a safe subset, blocking dangerous or unnecessary syscalls while allowing common ones required for typical application execution. It is the recommended way to enable seccomp without managing a custom profile.
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.
It disables seccomp for the pod
Why it's wrong here
RuntimeDefault enables a profile, it does not disable.
It applies the container runtime's default seccomp profile
Why this is correct
RuntimeDefault uses the runtime's default, which is usually a restricted profile.
Related concept
Read the scenario before looking for a memorised answer.
It allows all syscalls
Why it's wrong here
Unconfined allows all; RuntimeDefault restricts.
It uses a custom seccomp profile from a file
Why it's wrong here
Localhost would be used for a custom profile.
Common exam traps
The trap here is that candidates confuse `RuntimeDefault` with disabling seccomp or allowing all syscalls, when in fact it applies a restrictive, runtime-specific default profile that is neither fully permissive nor custom.
Detailed technical explanation
Under the hood, the container runtime (e.g., containerd) ships with a default seccomp profile that is based on the Docker default profile, which allows roughly 300+ syscalls out of over 400 available on Linux. This profile is dynamically loaded and applied to the container's seccomp filter before the container starts. A real-world scenario: if your application uses a syscall like `clone` with certain flags or `mount`, the default profile might block it, requiring you to switch to `Unconfined` or a custom profile.
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
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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: It applies the container runtime's default seccomp profile — Setting `seccompProfile.type: RuntimeDefault` in the Pod's securityContext instructs the container runtime (e.g., containerd or CRI-O) to apply its own default seccomp profile to the container. This default profile restricts system calls to a safe subset, blocking dangerous or unnecessary syscalls while allowing common ones required for typical application execution. It is the recommended way to enable seccomp without managing a custom profile.
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 25, 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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