- A
The container has all Linux capabilities dropped
The output shows that the 'drop' field contains 'ALL', meaning all capabilities are removed from the container.
- B
The output is invalid because capabilities should be in add field
Why wrong: The output is valid; capabilities can be dropped.
- C
The container has no capability restrictions
Why wrong: Dropping ALL capabilities imposes strict restrictions.
- D
The container has only the NET_ADMIN capability added
Why wrong: No capabilities are added; all are dropped.
Question 539 of 997
Drop All Linux Capabilities
This CKS practice question tests your understanding of minimize microservice vulnerabilities. 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 security engineer runs the following command to inspect a pod's security context:
kubectl get pod secure-pod -o jsonpath='{.spec.containers[0].securityContext.capabilities}'The output is: {"drop":["ALL"]}
What does this indicate?
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 has all Linux capabilities dropped
Option A is correct because the output `{"drop":["ALL"]}` indicates that the container's security context explicitly drops all Linux capabilities via the `drop` field. This is a common security hardening practice to reduce the attack surface by removing all privileged operations, such as `CAP_NET_ADMIN` or `CAP_SYS_ADMIN`, from the container's effective capability set.
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 has all Linux capabilities dropped
Why this is correct
The output shows that the 'drop' field contains 'ALL', meaning all capabilities are removed from the container.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The output is invalid because capabilities should be in add field
Why it's wrong here
The output is valid; capabilities can be dropped.
- ✗
The container has no capability restrictions
Why it's wrong here
Dropping ALL capabilities imposes strict restrictions.
- ✗
The container has only the NET_ADMIN capability added
Why it's wrong here
No capabilities are added; all are dropped.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The CKS exam often tests the misconception that the `drop` field is invalid or that dropping all capabilities leaves some capabilities intact, when in fact `drop:["ALL"]` is a valid and restrictive configuration that removes every Linux capability.
Trap categories for this question
Command / output trap
The output is valid; capabilities can be dropped.
Detailed technical explanation
How to think about this question
Under the hood, Linux capabilities are implemented as bitmasks in the kernel's task struct; dropping `ALL` sets the effective, permitted, and inheritable capability sets to zero, preventing the container from performing privileged operations like binding to low ports or modifying network settings. In Kubernetes, the `securityContext.capabilities` field maps directly to Docker's `--cap-drop` and `--cap-add` options, and dropping all capabilities is a recommended baseline for containers that do not require elevated privileges, as per the CIS Kubernetes Benchmark.
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.
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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FAQ
Questions learners often ask
What does this CKS question test?
Minimize Microservice Vulnerabilities — This question tests Minimize Microservice Vulnerabilities — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The container has all Linux capabilities dropped — Option A is correct because the output `{"drop":["ALL"]}` indicates that the container's security context explicitly drops all Linux capabilities via the `drop` field. This is a common security hardening practice to reduce the attack surface by removing all privileged operations, such as `CAP_NET_ADMIN` or `CAP_SYS_ADMIN`, from the container's effective capability set.
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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