SCS-C02 Identity and Access Management Practice Question
This SCS-C02 practice question tests your understanding of identity and access management. 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 company needs to allow an external auditor to access a specific S3 bucket for 30 days. The auditor does not have an AWS account. What is the MOST secure way to grant temporary access?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS STS to issue temporary credentials via a custom identity broker.
Option C is correct because you can create a role with a trust policy that allows the external auditor to assume it, and the auditor authenticates using their own credentials? But the auditor has no AWS account, so they cannot assume a role directly. The correct answer is to use a bucket policy granting access to a role that the auditor can assume via web identity federation? Actually, Option D is correct: Use STS temporary credentials with a custom federation broker. However, Option A is not secure. Option B is not possible without AWS account. Option C is not possible without trust. Option D is the best: you can create a federation proxy that authenticates the auditor and issues temporary credentials. Wait, let's reconsider. The correct answer is Option D: Use AWS STS to generate temporary credentials for the auditor after authenticating them via a custom identity broker. This is the recommended approach for granting access to external users without AWS accounts.
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 with long-term credentials and share them with the auditor.
Why it's wrong here
Long-term credentials are a security risk.
✓
Use AWS STS to issue temporary credentials via a custom identity broker.
Why this is correct
Temporary credentials can be issued after authenticating the auditor externally.
Related concept
Read the scenario before looking for a memorised answer.
✗
Grant access via a bucket policy using the auditor's email address as a condition.
Why it's wrong here
Email is not a valid condition key for authentication.
✗
Create an IAM role and allow the auditor to assume it using SAML federation.
Why it's wrong here
SAML requires the auditor to have an identity provider, which is not mentioned.
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 SCS-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.
Identity and Access Management — This question tests Identity and Access Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS STS to issue temporary credentials via a custom identity broker. — Option C is correct because you can create a role with a trust policy that allows the external auditor to assume it, and the auditor authenticates using their own credentials? But the auditor has no AWS account, so they cannot assume a role directly. The correct answer is to use a bucket policy granting access to a role that the auditor can assume via web identity federation? Actually, Option D is correct: Use STS temporary credentials with a custom federation broker. However, Option A is not secure. Option B is not possible without AWS account. Option C is not possible without trust. Option D is the best: you can create a federation proxy that authenticates the auditor and issues temporary credentials. Wait, let's reconsider. The correct answer is Option D: Use AWS STS to generate temporary credentials for the auditor after authenticating them via a custom identity broker. This is the recommended approach for granting access to external users without AWS accounts.
What should I do if I get this SCS-C02 question wrong?
Identify which SCS-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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