CKS Monitoring Logging and Runtime Security Practice Question
This CKS practice question tests your understanding of monitoring logging and runtime security. 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.
Which TWO actions are effective for detecting and preventing container breakout attempts using runtime security tools?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy Falco with rules that alert on 'syscall' events like 'clone' or 'unshare'.
Option D is correct because Falco is a CNCF runtime security tool that uses eBPF or kernel modules to intercept system calls. By alerting on sensitive syscalls like 'clone' (used to spawn new processes) or 'unshare' (used to create new namespaces), Falco can detect container breakout attempts where an attacker tries to escape the container's isolation. This provides real-time detection of anomalous behavior indicative of a breakout.
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.
✗
Set 'securityContext.seccompProfile.type: Unconfined' to allow all syscalls.
Why it's wrong here
Unconfined disables seccomp, increasing risk.
✗
Enable Kubernetes audit logging to capture exec commands.
Why it's wrong here
Audit logs record events, not prevent breakouts.
✗
Use PodSecurityPolicy to deny privileged containers.
Why it's wrong here
PSP is deprecated and does not detect breakouts.
✓
Deploy Falco with rules that alert on 'syscall' events like 'clone' or 'unshare'.
Why this is correct
Falco can detect breakout attempts via syscall monitoring.
Related concept
Read the scenario before looking for a memorised answer.
✓
Apply a seccomp profile that blocks unneeded syscalls for each container.
Why this is correct
Seccomp restricts syscalls, making breakout harder.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between admission control (e.g., PodSecurityPolicy, OPA/Gatekeeper) and runtime security (e.g., Falco, seccomp, AppArmor), leading candidates to select admission-based options like PodSecurityPolicy when the question explicitly asks for runtime security tools.
Detailed technical explanation
How to think about this question
Falco operates by consuming syscall events from the kernel via a driver (eBPF or kernel module) and matching them against a ruleset; for example, a rule like 'Container breakout: unshare' triggers when a container process calls unshare with CLONE_NEWNS or CLONE_NEWNET flags, indicating an attempt to create a new mount or network namespace. Seccomp profiles, when applied via the container runtime (e.g., containerd or CRI-O), restrict the syscalls a container can make; a default profile like 'RuntimeDefault' blocks ~44 dangerous syscalls, while a custom profile can block additional ones like 'mount' or 'ptrace' to prevent breakout vectors. In practice, combining Falco for detection with seccomp for prevention provides defense in depth against breakout attacks.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKS question in full detail.
Monitoring Logging and Runtime Security — This question tests Monitoring Logging and Runtime Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy Falco with rules that alert on 'syscall' events like 'clone' or 'unshare'. — Option D is correct because Falco is a CNCF runtime security tool that uses eBPF or kernel modules to intercept system calls. By alerting on sensitive syscalls like 'clone' (used to spawn new processes) or 'unshare' (used to create new namespaces), Falco can detect container breakout attempts where an attacker tries to escape the container's isolation. This provides real-time detection of anomalous behavior indicative of a breakout.
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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