The answer is to use AWS Security Token Service (STS) to issue temporary credentials that expire after 24 hours. AWS STS generates short-lived access keys and a session token, which are ideal for providing temporary S3 bucket access for a third-party auditor because you can set a precise expiration time, up to the maximum session duration of 36 hours for IAM roles. This scenario directly tests your understanding of the difference between temporary and long-term credentials on the AWS Certified SysOps Administrator Associate SOA-C02 exam, where a common trap is confusing pre-signed URLs (which grant object-level access) with STS (which grants bucket-level access). Remember that IAM users have permanent keys, while STS is purpose-built for time-limited, auditable access. Memory tip: STS = Short-Term Security, perfect for a 24-hour audit window.
SOA-C02 Security and Compliance Practice Question
This SOA-C02 practice question tests your understanding of security and compliance. 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.
A SysOps administrator needs to provide temporary access to an S3 bucket for a third-party auditor. The access must expire after 24 hours. Which solution should the administrator use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Security Token Service (STS) to issue temporary credentials that expire after 24 hours.
Option D is correct because STS is designed to issue temporary credentials with a specified expiration. Option A is wrong because IAM users have long-term credentials. Option B is wrong because bucket policies grant access to IAM principals, not temporary credentials. Option C is wrong because pre-signed URLs grant access to a specific object, not the bucket.
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.
✗
Create an IAM user for the auditor and attach a policy granting access to the bucket.
Why it's wrong here
IAM users have permanent credentials, not temporary.
✗
Create a bucket policy that grants access to the auditor's AWS account.
Why it's wrong here
Bucket policies grant access to IAM principals, not temporary credentials.
✓
Use AWS Security Token Service (STS) to issue temporary credentials that expire after 24 hours.
Why this is correct
STS issues temporary credentials that can be configured to expire.
Related concept
Read the scenario before looking for a memorised answer.
✗
Generate a pre-signed URL for the bucket.
Why it's wrong here
Pre-signed URLs are for individual objects, not bucket-level access.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-C02 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.
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Security Token Service (STS) to issue temporary credentials that expire after 24 hours. — Option D is correct because STS is designed to issue temporary credentials with a specified expiration. Option A is wrong because IAM users have long-term credentials. Option B is wrong because bucket policies grant access to IAM principals, not temporary credentials. Option C is wrong because pre-signed URLs grant access to a specific object, not the bucket.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 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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Question Discussion
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