The answer is OSSEC with a central manager, as it provides the most efficient and secure file integrity monitoring for Linux servers using an agentless automated approach. This tool works by deploying a central manager that remotely checks file hashes across the fleet via SSH, eliminating the need to install agents on each server while still detecting unauthorized changes through baseline comparison. On the CompTIA SecurityX CAS-004 exam, this question tests your understanding of centralized versus distributed monitoring architectures, with a common trap being to choose a distributed agent-based solution that increases management overhead or a syslog-dependent method that misses low-level file alterations. Remember that agentless tools like OSSEC reduce attack surface and administrative burden, making them ideal for large fleets. A helpful memory tip: think “Central Eyes, No Agents” to recall that OSSEC’s central manager watches files without local software.
CAS-004 Scripting, Containers and Automation Practice Question
This CAS-004 practice question tests your understanding of scripting, containers and automation. 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 analyst needs to write a script that detects changes to critical files across a fleet of Linux servers. Which approach is most efficient and secure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an agentless tool like OSSEC with a central manager to report file integrity changes.
Option C is correct because OSSEC provides centralized file integrity monitoring with agentless capability. Option A is distributed and harder to manage. Option B relies on syslog, which may not capture all changes. Option D is more complex and not as efficient.
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 a cron job on each server running a Python script that checks file hashes.
Why it's wrong here
Distributed scripts are harder to maintain and inconsistent.
✗
Enable Linux auditd on each server and forward logs to a SIEM for analysis.
Why it's wrong here
auditd + SIEM is more complex and resource-intensive.
✗
Deploy a centralized log server and parse syslog for file modifications.
Use an agentless tool like OSSEC with a central manager to report file integrity changes.
Why this is correct
OSSEC provides centralized, efficient monitoring.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 CAS-004 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 CAS-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use an agentless tool like OSSEC with a central manager to report file integrity changes. — Option C is correct because OSSEC provides centralized file integrity monitoring with agentless capability. Option A is distributed and harder to manage. Option B relies on syslog, which may not capture all changes. Option D is more complex and not as efficient.
What should I do if I get this CAS-004 question wrong?
Identify which CAS-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This CAS-004 practice question is part of Courseiva's free CompTIA 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 CAS-004 exam.
Question Discussion
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