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 TWO of the following are valid methods to apply a custom seccomp profile to a pod in Kubernetes?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Setting the annotation 'seccomp.security.alpha.kubernetes.io/pod' on the pod
Option A is correct because the annotation 'seccomp.security.alpha.kubernetes.io/pod' was the original method to apply a seccomp profile to a pod in Kubernetes versions prior to 1.19. This annotation is still valid in older clusters or when using the alpha API, and it directly specifies the seccomp profile path or type for the pod.
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.
✓
Setting the annotation 'seccomp.security.alpha.kubernetes.io/pod' on the pod
Why this is correct
This is a valid (though deprecated) method.
Related concept
Read the scenario before looking for a memorised answer.
✗
Using 'securityContext.seccompProfile.type: RuntimeDefault' with 'localhostProfile' set
Why it's wrong here
RuntimeDefault does not use a localhostProfile; it uses the runtime's default.
✗
Configuring the kubelet with --seccomp-default-profile flag
Why it's wrong here
This sets a default profile for all pods, not a custom one for a specific pod.
✓
Using 'securityContext.seccompProfile.type: Localhost' with 'localhostProfile' set
Why this is correct
This is the current recommended method.
Related concept
Read the scenario before looking for a memorised answer.
✗
Adding a seccomp profile to the container image and referencing it in the pod spec
Why it's wrong here
Seccomp profiles are not part of container images; they must be placed on the node.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between the deprecated annotation method and the current 'securityContext.seccompProfile' field, and the trap here is that candidates may think 'localhostProfile' can be combined with 'RuntimeDefault' or that profiles can be embedded in container images, which is incorrect.
Detailed technical explanation
How to think about this question
The seccomp profile mechanism in Kubernetes uses the 'securityContext.seccompProfile' field (GA since 1.19) with types 'RuntimeDefault', 'Localhost', or 'Unconfined'. When using 'Localhost', the 'localhostProfile' field specifies the path relative to the kubelet's seccomp profile root directory (default '/var/lib/kubelet/seccomp'). The older annotation method 'seccomp.security.alpha.kubernetes.io/pod' is deprecated but still functional for backward compatibility. In practice, custom profiles are often used to restrict syscalls for high-risk containers, such as those running untrusted code, to reduce the attack surface.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKS question in full detail.
System Hardening — This question tests System Hardening — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Setting the annotation 'seccomp.security.alpha.kubernetes.io/pod' on the pod — Option A is correct because the annotation 'seccomp.security.alpha.kubernetes.io/pod' was the original method to apply a seccomp profile to a pod in Kubernetes versions prior to 1.19. This annotation is still valid in older clusters or when using the alpha API, and it directly specifies the seccomp profile path or type for the pod.
What should I do if I get this CKS 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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Question Discussion
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