This CKS practice question tests your understanding of system hardening. 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.
You are creating a custom seccomp profile for a container that runs a binary requiring the 'write' syscall only. You place the profile JSON file at '/var/lib/kubelet/seccomp/profiles/write-only.json'. In the pod spec, which seccomp configuration correctly uses this profile?
Option C is correct because when using a custom seccomp profile with type 'Localhost', the 'localhostProfile' field must specify a path relative to the kubelet's seccomp root directory (default: /var/lib/kubelet/seccomp). The path 'profiles/write-only.json' is relative and resolves to /var/lib/kubelet/seccomp/profiles/write-only.json, matching the file location. The 'type' field must be 'Localhost' to reference a local profile file.
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.
The correct field name is 'localhostProfile', not 'profile'.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between relative and absolute paths for 'localhostProfile', and the trap here is that candidates mistakenly use an absolute path (option B) or confuse the field name 'localhostProfile' with 'profile' (option D), while also testing that 'type: RuntimeDefault' cannot be combined with a custom profile path.
Detailed technical explanation
How to think about this question
The kubelet's seccomp root directory is configured via the '--seccomp-default-profile' or '--seccomp-profile-root' flag, defaulting to /var/lib/kubelet/seccomp. When type is 'Localhost', the kubelet prepends this root to the relative path in 'localhostProfile' to locate the JSON file. This design allows profile paths to be portable across nodes without hardcoding absolute paths. The seccomp profile must be a valid JSON file defining syscall rules; in this case, it would allow only the 'write' syscall and deny all others.
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: securityContext:
seccompProfile:
type: Localhost
localhostProfile: profiles/write-only.json — Option C is correct because when using a custom seccomp profile with type 'Localhost', the 'localhostProfile' field must specify a path relative to the kubelet's seccomp root directory (default: /var/lib/kubelet/seccomp). The path 'profiles/write-only.json' is relative and resolves to /var/lib/kubelet/seccomp/profiles/write-only.json, matching the file location. The 'type' field must be 'Localhost' to reference a local profile file.
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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