This CCSP practice question tests your understanding of cloud application 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 of the following are considered best practices for securing containerized applications in a cloud environment?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Run containers with a non-root user.
Running containers with a non-root user is a fundamental security best practice because it limits the potential damage from a container breakout. By default, Docker containers run as root, which means if an attacker compromises the container, they have root privileges on the host kernel. Using the USER directive in a Dockerfile or specifying a non-root user at runtime reduces the attack surface and enforces the principle of least privilege.
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.
✓
Run containers with a non-root user.
Why this is correct
Limits potential damage if container is compromised.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable SSH inside the container for remote administration.
Why it's wrong here
SSH in containers is discouraged; use orchestration tools.
✗
Use the 'latest' tag for base images to get the newest features.
Why it's wrong here
'Latest' may introduce unplanned changes and vulnerabilities.
✗
Include debugging tools inside the container for troubleshooting.
Why it's wrong here
Increases attack surface; tools should be excluded from production images.
✓
Use a read-only filesystem for the container.
Why this is correct
Prevents malicious modification of files.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that SSH or debugging tools are necessary for container management, when in fact they violate the immutable and ephemeral principles of container security; the trap is that candidates confuse traditional server administration with cloud-native container operations.
Detailed technical explanation
How to think about this question
Under the hood, Linux capabilities and user namespaces can further isolate container processes; for example, mapping a container's root user to a non-root user on the host (via user namespaces) adds another layer of protection. A read-only filesystem (option E) prevents attackers from writing malicious files or modifying binaries at runtime, and it works well with ephemeral storage patterns where only specific volumes are writable. In a real-world scenario, a compromised container with a writable root filesystem could be used to install cryptominers or alter system binaries, whereas a read-only filesystem would block such actions entirely.
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 SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
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.
Cloud Application Security — This question tests Cloud Application Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Run containers with a non-root user. — Running containers with a non-root user is a fundamental security best practice because it limits the potential damage from a container breakout. By default, Docker containers run as root, which means if an attacker compromises the container, they have root privileges on the host kernel. Using the USER directive in a Dockerfile or specifying a non-root user at runtime reduces the attack surface and enforces the principle of least privilege.
What should I do if I get this CCSP 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.
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Question Discussion
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