This CKS practice question tests your understanding of system hardening. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 modes for an AppArmor profile?
unconfined
Why wrong: Unconfined means no AppArmor profile is applied; it is not a profile mode.
complain
In complain mode, violations are logged but not blocked.
enforce
In enforce mode, the profile actively restricts operations.
permissive
Why wrong: Permissive is not a standard AppArmor mode; it is similar to complain but not the official term.
audit
Why wrong: Audit is not a separate mode; complain mode provides audit logging.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
complain
AppArmor profiles operate in two primary modes: 'complain' (also known as 'learning' mode) and 'enforce' (also known as 'confined' mode). In complain mode, policy violations are logged but not blocked, allowing administrators to test and refine profiles. In enforce mode, violations are both logged and blocked, actively restricting the application's behavior according to the profile.
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.
unconfined
Why it's wrong here
Unconfined means no AppArmor profile is applied; it is not a profile mode.
complain
Why this is correct
In complain mode, violations are logged but not blocked.
Related concept
Read the scenario before looking for a memorised answer.
enforce
Why this is correct
In enforce mode, the profile actively restricts operations.
Related concept
Read the scenario before looking for a memorised answer.
permissive
Why it's wrong here
Permissive is not a standard AppArmor mode; it is similar to complain but not the official term.
audit
Why it's wrong here
Audit is not a separate mode; complain mode provides audit logging.
Common exam traps
CNCF often tests the distinction between AppArmor and SELinux terminology, where candidates mistakenly apply SELinux concepts (like 'permissive' or 'enforcing') to AppArmor, which uses 'complain' and 'enforce' as its only two valid modes.
Trap categories for this question
Similar concept trap
Permissive is not a standard AppArmor mode; it is similar to complain but not the official term.
Detailed technical explanation
Under the hood, AppArmor profiles are loaded into the Linux Security Module (LSM) framework. When a profile is in complain mode, the LSM hook functions log access attempts via the audit subsystem (using `audit_log` or `printk`) but allow the operation to proceed. In enforce mode, the same hooks return -EACCES or -EPERM for denied operations. A common real-world scenario is deploying a new container runtime profile in complain mode first, monitoring logs with `aa-logprof` to generate a refined profile, then switching to enforce mode for production.
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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: complain — AppArmor profiles operate in two primary modes: 'complain' (also known as 'learning' mode) and 'enforce' (also known as 'confined' mode). In complain mode, policy violations are logged but not blocked, allowing administrators to test and refine profiles. In enforce mode, violations are both logged and blocked, actively restricting the application's behavior according to the profile.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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