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.
A security team wants to detect anomalous process executions in containers without modifying the container images or requiring agents inside containers. Which approach is most suitable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy Falco as a DaemonSet using eBPF probe to monitor system calls.
Falco, deployed as a DaemonSet with an eBPF probe, can monitor system calls at the kernel level without modifying container images or requiring agents inside containers. This allows it to detect anomalous process executions in real time by analyzing syscall events from the host, which is the most suitable approach for runtime security monitoring 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.
✗
Configure CRI-O to log all container process starts to syslog.
Why it's wrong here
CRI-O does not provide process-level logging; would require runtime modification.
✓
Deploy Falco as a DaemonSet using eBPF probe to monitor system calls.
Why this is correct
Falco on the host can detect container process anomalies without modifying images.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Kubernetes audit logging and parse the logs for process events.
Why it's wrong here
Audit logs capture API requests, not container process syscalls.
✗
Use OPA Gatekeeper to enforce allowed process lists in pod specs.
Why it's wrong here
OPA/Gatekeeper validates admission, not runtime process execution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between admission control (e.g., OPA Gatekeeper) and runtime monitoring (e.g., Falco), where candidates mistakenly choose a policy enforcement tool for detection tasks.
Detailed technical explanation
How to think about this question
Falco uses eBPF to hook into system calls like execve and clone, capturing process execution events from the host kernel without needing to run inside containers. This approach leverages kernel-level tracing, which is more efficient and less intrusive than user-space agents, and can detect threats like reverse shells or cryptominers even in immutable container images. In a real-world scenario, Falco can alert on unexpected binaries like `nc` or `curl` spawning in a production pod, providing runtime security without image modification.
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.
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 as a DaemonSet using eBPF probe to monitor system calls. — Falco, deployed as a DaemonSet with an eBPF probe, can monitor system calls at the kernel level without modifying container images or requiring agents inside containers. This allows it to detect anomalous process executions in real time by analyzing syscall events from the host, which is the most suitable approach for runtime security monitoring 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.
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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