- A
Use minimal base images like distroless
Minimal base images reduce attack surface by including only necessary components.
- B
Use the 'latest' tag
Why wrong: Using 'latest' is not recommended as it is mutable.
- C
Include debugging tools in the image
Why wrong: Debugging tools add unnecessary packages and increase attack surface.
- D
Run containers as root user
Why wrong: Running as root increases risk; non-root is recommended.
Question 513 of 997
Why Use Distroless Images? Best Practice for Container Security
This CKS practice question tests your understanding of supply chain 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 of the following is a BEST practice for container images to reduce the attack surface?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
✓
Use minimal base images like distroless
Distroless images contain only the application and its runtime dependencies, omitting package managers, shells, and other utilities that could be exploited. This drastically reduces the number of CVEs present in the image and limits the tools available to an attacker who gains code execution inside the container.
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.
- ✓
Use minimal base images like distroless
Why this is correct
Minimal base images reduce attack surface by including only necessary components.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use the 'latest' tag
Why it's wrong here
Using 'latest' is not recommended as it is mutable.
- ✗
Include debugging tools in the image
Why it's wrong here
Debugging tools add unnecessary packages and increase attack surface.
- ✗
Run containers as root user
Why it's wrong here
Running as root increases risk; non-root is recommended.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The CKS exam often tests the misconception that 'latest' is a safe default or that debugging tools are harmless because they are only for development, when in fact both practices increase the attack surface in production.
Detailed technical explanation
How to think about this question
Distroless images are built by Google and use a single-layer approach with only the statically linked binary and its library dependencies (e.g., glibc, libssl). They do not include a shell or package manager, so even if an attacker exploits an application vulnerability, they cannot run commands like 'apt-get' or 'curl' to download additional payloads. In a real-world scenario, a compromised Node.js app running on a distroless image would leave an attacker with no shell to pivot from, forcing them to rely solely on the application's own functionality.
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.
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.
- →
Supply Chain Security — study guide chapter
Learn the concepts, then practise the questions
- →
Supply Chain Security practice questions
Targeted practice on this topic area only
- →
All CKS questions
997 questions across all exam domains
- →
Certified Kubernetes Security Specialist CKS study guide
Full concept coverage aligned to exam objectives
- →
CKS practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related CKS practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Monitoring Logging and Runtime Security practice questions
Practise CKS questions linked to Monitoring Logging and Runtime Security.
Cluster Setup and Hardening practice questions
Practise CKS questions linked to Cluster Setup and Hardening.
System Hardening practice questions
Practise CKS questions linked to System Hardening.
Minimize Microservice Vulnerabilities practice questions
Practise CKS questions linked to Minimize Microservice Vulnerabilities.
Supply Chain Security practice questions
Practise CKS questions linked to Supply Chain Security.
Monitoring, Logging and Runtime Security practice questions
Practise CKS questions linked to Monitoring, Logging and Runtime Security.
Cluster Setup practice questions
Practise CKS questions linked to Cluster Setup.
Cluster Hardening practice questions
Practise CKS questions linked to Cluster Hardening.
CKS fundamentals practice questions
Practise CKS questions linked to CKS fundamentals.
CKS scenario practice questions
Practise CKS questions linked to CKS scenario.
CKS troubleshooting practice questions
Practise CKS questions linked to CKS troubleshooting.
Practice this exam
Start a free CKS practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this CKS question test?
Supply Chain Security — This question tests Supply Chain Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use minimal base images like distroless — Distroless images contain only the application and its runtime dependencies, omitting package managers, shells, and other utilities that could be exploited. This drastically reduces the number of CVEs present in the image and limits the tools available to an attacker who gains code execution inside the container.
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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
Same concept, more angles
1 more ways this is tested on CKS
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO are benefits of using a distroless base image over a full OS image like Ubuntu? (Select two.)
medium- A.Faster image build times
- ✓ B.Smaller image size
- C.Better compatibility with Kubernetes security contexts
- ✓ D.Smaller attack surface
- E.Easier debugging
Why B: Option B is correct because distroless images contain only the application and its runtime dependencies, omitting package managers, shells, and other OS utilities. This results in a significantly smaller image size compared to full OS images like Ubuntu, which include a complete userland and filesystem. Smaller images reduce storage costs, network transfer times, and container startup latency.
Keep practising
More CKS practice questions
- Which flag is used to restrict the kubelet's ability to modify node status and pods?
- A Falco rule has priority `WARNING` and output: `Sensitive file opened (user=%user.name command=%proc.cmdline file=%fd.n…
- Falco detects a shell being opened inside a container. Which Falco rule field is used to specify the syscall condition f…
- A security audit reveals that a ServiceAccount named 'monitor' has a ClusterRoleBinding to the cluster-admin role. What…
- Match each Kubernetes security component to its description.
- Match each Kubernetes certificate type to its usage.
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.
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.