The answer is to rotate IAM user access keys regularly. This is a core best practice because long-term access keys represent a persistent credential risk; if they are compromised, an attacker retains indefinite access until the key is manually revoked. Regular rotation limits the exposure window of any leaked key and aligns with the AWS shared responsibility model for credential management. On the AWS Certified Security Specialty SCS-C02 exam, this concept tests your understanding of the difference between long-term credentials (IAM user keys) and temporary credentials (STS roles), a frequent trap where candidates confuse static keys with the automatic rotation provided by IAM roles for EC2. A common memory tip is to think of IAM user keys as “permanent passwords” that must be changed on a schedule, whereas roles give you “temporary tokens” that expire automatically—so if you see “rotate keys” in the answer set, it is almost always a correct choice for securing IAM user credentials.
SCS-C02 Identity and Access Management Practice Question
This SCS-C02 practice question tests your understanding of identity and access management. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which THREE are best practices for securing IAM in an AWS environment? (Choose THREE.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use IAM roles for applications running on EC2.
Option A is correct because using IAM roles for EC2 instances eliminates the need to store long-term AWS credentials (access keys) on the instance. Instead, the instance assumes the role via the EC2 metadata service, which automatically rotates temporary security credentials (via AWS STS). This follows the principle of least privilege and reduces the risk of credential leakage.
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 IAM roles for applications running on EC2.
Why this is correct
Roles provide temporary credentials and are more secure than access keys.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the AWS account root user for daily administrative tasks.
Why it's wrong here
Root user should be used only for a few tasks; IAM users should be used for daily tasks.
✗
Grant broad permissions to simplify management.
Why it's wrong here
Granting broad permissions violates the principle of least privilege.
✓
Rotate IAM user access keys regularly.
Why this is correct
Regular rotation reduces the risk of compromised keys.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that the root user is acceptable for daily tasks because it has full access, but the trap is that the root user lacks granular audit trails and cannot be restricted by IAM policies, making it a massive security risk for routine operations.
Detailed technical explanation
How to think about this question
IAM roles for EC2 rely on the AWS Security Token Service (STS) to issue temporary credentials that are automatically rotated every time the instance refreshes its metadata. This avoids the operational overhead of rotating long-term access keys and eliminates the risk of keys being accidentally committed to code or configuration files. In a real-world scenario, if an EC2 instance is compromised, the attacker only gains access to short-lived credentials, limiting the window of exposure.
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.
TExam Day Tips
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 IAM roles for applications running on EC2. — Option A is correct because using IAM roles for EC2 instances eliminates the need to store long-term AWS credentials (access keys) on the instance. Instead, the instance assumes the role via the EC2 metadata service, which automatically rotates temporary security credentials (via AWS STS). This follows the principle of least privilege and reduces the risk of credential leakage.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO of the following are best practices for managing IAM user credentials? (Choose TWO.)
easy
A.Create a single IAM user for multiple developers.
B.Store access keys in source code repositories for convenience.
✓ C.Enable MFA for all IAM users.
✓ D.Rotate access keys regularly.
E.Use long-term access keys for all users.
Why C: Options B and D are correct: enable MFA for all users, and rotate access keys regularly. Option A is not a best practice; use roles instead. Option C is not a best practice; use IAM roles for applications. Option E is not recommended; use IAM roles.
Variation 2. Which TWO are IAM best practices? (Choose two.)
easy
A.Avoid using IAM roles and instead attach policies directly to users.
B.Use the root user for everyday administrative tasks.
C.Grant broad permissions to all users to simplify management.
✓ D.Use conditions in IAM policies to restrict access based on tags or IP addresses.
✓ E.Use IAM roles for applications that run on EC2 instances.
Why D: Option D is correct because using conditions in IAM policies (e.g., `aws:SourceIp`, `aws:RequestTag`) allows you to enforce fine-grained access control based on contextual attributes like IP addresses or resource tags. This follows the principle of least privilege by restricting permissions to only the necessary scope, reducing the attack surface. For example, you can deny access to S3 buckets unless the request originates from a corporate IP range.
Last reviewed: Jun 24, 2026
Question Discussion
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This SCS-C02 practice question is part of Courseiva's free Amazon Web Services 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 SCS-C02 exam.
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