hardMultiple ChoiceObjective-mapped

CAS-004 Practice Question: Refer to the exhibit

Exhibit

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": "*",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::example-bucket/*"
    }
  ]
}

Refer to the exhibit. A cloud security engineer is reviewing an AWS S3 bucket policy. What security issue does the policy contain?

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

✓

Public read access is allowed

The policy allows any principal ('*') to perform s3:GetObject on the bucket, making the bucket publicly readable. This exposes objects to anyone on the internet. No encryption, logging, or versioning issues are indicated by this JSON snippet.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
No server-side encryption is specified
Why it's wrong here
The policy does not mention encryption, but that is not an inherent issue; encryption can be configured elsewhere.
✓
Public read access is allowed
Why this is correct
Principal '*' with Allow effect grants anonymous access to objects, making them public.
✗
No version ID is specified in the resource
Why it's wrong here
Version ID is not required; the policy applies to all objects with the wildcard.
✗
No logging is enabled for the bucket
Why it's wrong here
Logging is a separate configuration not shown in the policy; absence is not a security issue by itself.

Quick reference

AWS S3 Storage Class Comparison

Storage Class	Min Duration	Retrieval	Use Case
S3 Standard	None	Immediate	Frequently accessed data
S3 Standard-IA	30 days	Immediate	Infrequent access, rapid retrieval
S3 One Zone-IA	30 days	Immediate	Non-critical infrequent data
S3 Intelligent-Tiering	None	Immediate–hours	Unknown or changing access patterns
S3 Glacier Instant	90 days	Milliseconds	Archive with instant retrieval
S3 Glacier Flexible	90 days	Minutes–hours	Archive, flexible retrieval
S3 Glacier Deep Archive	180 days	Hours	Long-term compliance archive

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CAS-004 Practice Question: Refer to the exhibit

Exhibit

Why each option matters

Option-by-option breakdown

AWS S3 Storage Class Comparison

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