- A
The container is limited to a set of allowed syscalls as defined by the runtime.
Why wrong: That describes RuntimeDefault, not Unconfined.
- B
The container can make any system call.
Unconfined disables seccomp, so no syscall filtering occurs.
- C
Seccomp is not supported on this node.
Why wrong: Unconfined is a valid type; seccomp is supported but not enforced.
- D
The container is running with the host's seccomp profile.
Why wrong: Unconfined does not use host profile; it disables seccomp.
Question 183 of 997
seccomp Unconfined: Full Syscall Access
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.
A pod is running with securityContext.seccompProfile.type: Unconfined. Which statement is true?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The container can make any system call.
When `securityContext.seccompProfile.type` is set to `Unconfined`, the container is allowed to make any system call without restriction. Seccomp (secure computing mode) is a Linux kernel feature that filters syscalls; `Unconfined` explicitly disables this filter, granting the container full syscall access. This is the most permissive seccomp profile and is the default if no profile is specified in older Kubernetes versions.
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 container is limited to a set of allowed syscalls as defined by the runtime.
Why it's wrong here
That describes RuntimeDefault, not Unconfined.
- ✓
The container can make any system call.
Why this is correct
Unconfined disables seccomp, so no syscall filtering occurs.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Seccomp is not supported on this node.
Why it's wrong here
Unconfined is a valid type; seccomp is supported but not enforced.
- ✗
The container is running with the host's seccomp profile.
Why it's wrong here
Unconfined does not use host profile; it disables seccomp.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often mistake Unconfined for using the node's seccomp profile or think it means seccomp is unsupported, when in fact it explicitly disables syscall filtering.
Detailed technical explanation
How to think about this question
Under the hood, seccomp operates by loading a BPF (Berkeley Packet Filter) program into the kernel that intercepts syscalls. When set to `Unconfined`, no BPF program is loaded, and the container's processes can invoke any syscall, including privileged ones like `mount` or `reboot`. In a real-world scenario, this is a security risk because a compromised container could exploit kernel vulnerabilities; the recommended practice is to use `RuntimeDefault` or a custom profile that allows only necessary syscalls, such as those defined by the OCI runtime specification.
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 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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System Hardening — study guide chapter
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FAQ
Questions learners often ask
What does this CKS question test?
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: The container can make any system call. — When `securityContext.seccompProfile.type` is set to `Unconfined`, the container is allowed to make any system call without restriction. Seccomp (secure computing mode) is a Linux kernel feature that filters syscalls; `Unconfined` explicitly disables this filter, granting the container full syscall access. This is the most permissive seccomp profile and is the default if no profile is specified in older Kubernetes versions.
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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Last reviewed: Jul 4, 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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