CAS-004 Practice Question: Application Environment, Configuration and Security
This CAS-004 practice question tests your understanding of application environment, configuration and security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Network Topology
Refer to the exhibit. A security engineer reviews the S3 bucket policy. Which of the following is the most concerning security issue?
Why wrong: Encryption in transit is not controlled by bucket policies; it is configured separately via endpoints or bucket policies that deny HTTP requests.
B
The policy uses the incorrect version of the policy language
Why wrong: The version 2012-10-17 is the current and correct version for IAM policies.
C
The policy allows any user to list the objects in the bucket
Why wrong: The action is s3:GetObject, not s3:ListBucket, so listing is not allowed.
D
The policy allows public read access to all objects in the bucket
Principal: * with s3:GetObject allows anonymous read access to all objects.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The policy allows public read access to all objects in the bucket
Option B is correct because the policy allows any user (Principal: *) to read objects (s3:GetObject) from the bucket, making data publicly accessible. Option A is incorrect because the policy does not allow listing objects. Option C is incorrect because the policy version is fine. Option D is not enforced by this policy.
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.
✗
The policy does not require encryption in transit
Why it's wrong here
Encryption in transit is not controlled by bucket policies; it is configured separately via endpoints or bucket policies that deny HTTP requests.
✗
The policy uses the incorrect version of the policy language
Why it's wrong here
The version 2012-10-17 is the current and correct version for IAM policies.
✗
The policy allows any user to list the objects in the bucket
Why it's wrong here
The action is s3:GetObject, not s3:ListBucket, so listing is not allowed.
✓
The policy allows public read access to all objects in the bucket
Why this is correct
Principal: * with s3:GetObject allows anonymous read access to all objects.
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.
Application Environment, Configuration and Security — This question tests Application Environment, Configuration and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The policy allows public read access to all objects in the bucket — Option B is correct because the policy allows any user (Principal: *) to read objects (s3:GetObject) from the bucket, making data publicly accessible. Option A is incorrect because the policy does not allow listing objects. Option C is incorrect because the policy version is fine. Option D is not enforced by this policy.
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.
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 →
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.
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
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.