This CKS practice question tests your understanding of system hardening. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 with the following annotation is created: 'container.apparmor.security.beta.kubernetes.io/webserver: localhost/k8s-apparmor-profile'. However, the pod remains in 'Pending' state and the node logs show 'AppArmor not available'. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AppArmor is not loaded or enabled on the node kernel
The node logs explicitly state 'AppArmor not available', which indicates that the AppArmor kernel security module is either not loaded or not enabled on the node's operating system. Without AppArmor support in the kernel, the kubelet cannot enforce the profile specified in the pod annotation, causing the pod to remain in 'Pending' state. This is a prerequisite condition for AppArmor profiles to work in Kubernetes.
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 annotation should be on the pod's securityContext, not as an annotation
Why it's wrong here
AppArmor is applied via annotations, not securityContext; the annotation format is correct.
✓
AppArmor is not loaded or enabled on the node kernel
Why this is correct
The error indicates AppArmor is not available on the node. It needs to be enabled in the kernel and the apparmor_parser used to load profiles.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The AppArmor profile name is misspelled
Why it's wrong here
If the profile name were misspelled, the error would be about 'profile not found', not 'AppArmor not available'.
✗
The pod is using a privileged security context
Why it's wrong here
Privileged containers can still use AppArmor if available. The error is about AppArmor not being available.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between a profile being misconfigured (e.g., wrong name) versus the underlying kernel module not being available; the trap here is that candidates may assume a spelling error (Option C) when the node logs clearly point to a missing kernel feature.
Detailed technical explanation
How to think about this question
AppArmor is a Linux Security Module (LSM) that must be compiled into the kernel and enabled at boot (via apparmor=1 security=apparmor kernel parameters). The kubelet checks for AppArmor availability by reading /sys/module/apparmor/parameters/enabled; if it returns 'N', the node will not enforce any AppArmor profiles. In a real-world scenario, this often occurs when using a minimal container-optimized OS (e.g., Flatcar, Bottlerocket) that may not include AppArmor, or when the node's kernel was built without CONFIG_SECURITY_APPARMOR.
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 junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
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: AppArmor is not loaded or enabled on the node kernel — The node logs explicitly state 'AppArmor not available', which indicates that the AppArmor kernel security module is either not loaded or not enabled on the node's operating system. Without AppArmor support in the kernel, the kubelet cannot enforce the profile specified in the pod annotation, causing the pod to remain in 'Pending' state. This is a prerequisite condition for AppArmor profiles to work in Kubernetes.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.