This CKS practice question tests your understanding of system hardening. 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 of the following is NOT a valid seccomp profile type in Kubernetes?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "NOT"
Why it matters: Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
SeccompDefault
There is no 'SeccompDefault' type. The correct type is 'RuntimeDefault'.
Unconfined
Why wrong: Unconfined is valid; it disables seccomp.
RuntimeDefault
Why wrong: RuntimeDefault is a valid seccomp profile type.
Localhost
Why wrong: Localhost is valid for specifying a custom profile file.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
SeccompDefault
SeccompDefault is not a valid seccomp profile type in Kubernetes. The valid profile types are Unconfined, RuntimeDefault, and Localhost. SeccompDefault is a feature gate (introduced in Kubernetes 1.22) that, when enabled, tells the kubelet to use the RuntimeDefault seccomp profile by default for pods, but it is not itself a profile type.
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.
SeccompDefault
Why this is correct
There is no 'SeccompDefault' type. The correct type is 'RuntimeDefault'.
Clue confirmation
The clue word "NOT" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Unconfined
Why it's wrong here
Unconfined is valid; it disables seccomp.
RuntimeDefault
Why it's wrong here
RuntimeDefault is a valid seccomp profile type.
Localhost
Why it's wrong here
Localhost is valid for specifying a custom profile file.
Common exam traps
The trap here is that candidates confuse the SeccompDefault feature gate with a valid seccomp profile type, especially since the feature gate name sounds like a profile type and is often mentioned in the context of default seccomp enforcement.
Detailed technical explanation
Seccomp (secure computing mode) profiles in Kubernetes are defined in the pod's security context under `seccompProfile.type`. The valid types map to the `SeccompProfile` struct in the Kubernetes API: `Unconfined` (no seccomp), `RuntimeDefault` (runtime's default, e.g., containerd's default.json), and `Localhost` (path to a custom profile on the node). The `SeccompDefault` feature gate, when enabled, automatically sets `RuntimeDefault` for pods that don't specify a seccomp profile, but it is not a profile type itself. A common real-world scenario is misconfiguring pod security standards (PSS) where `SeccompDefault` is required as a feature gate to enforce baseline/restricted policies, but the profile type must still be `RuntimeDefault`.
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 CKS 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
System Hardening — This question tests System Hardening — Read the scenario before looking for a memorised answer..
The correct answer is: SeccompDefault — SeccompDefault is not a valid seccomp profile type in Kubernetes. The valid profile types are Unconfined, RuntimeDefault, and Localhost. SeccompDefault is a feature gate (introduced in Kubernetes 1.22) that, when enabled, tells the kubelet to use the RuntimeDefault seccomp profile by default for pods, but it is not itself a profile type.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "NOT". Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This CKS 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 CKS exam.
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