The answer is IAM Roles with cross-account access. This IAM feature is the correct choice because it allows you to grant temporary, limited access to AWS resources for users who don’t have AWS accounts, such as third-party contractors, without needing to create permanent IAM users for them. When an external user assumes the role, AWS Security Token Service (STS) issues temporary credentials that automatically expire after a defined duration, enforcing least-privilege access. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of how to securely manage external access without sharing long-term keys; a common trap is confusing IAM Roles with IAM Users or cross-account access with resource-based policies. Remember the key distinction: roles are assumed, not assigned, and the temporary credentials from STS are the mechanism that makes this secure. A helpful memory tip is “Role for a goal, not a user for a snooze”—roles are temporary and task-focused, while users are permanent.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. 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 IAM feature allows you to grant temporary, limited access to AWS resources for users who don't have AWS accounts, such as third-party contractors?
Why wrong: IAM Groups organize existing IAM users with shared permissions — they don't grant access to non-AWS-account holders.
B
IAM Roles with cross-account access
IAM Roles with STS AssumeRole grant temporary credentials to external identities without requiring permanent IAM users, with fine-grained permissions and automatic expiration.
C
IAM password policies
Why wrong: Password policies govern password complexity for existing IAM users — they don't grant access to external parties.
D
Service Control Policies (SCPs)
Why wrong: SCPs are AWS Organizations policies that restrict permissions within member accounts — they don't grant access to external parties.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
IAM Roles with cross-account access
IAM Roles with cross-account access allow you to grant temporary, limited permissions to users from another AWS account or external identity providers (e.g., third-party contractors) without creating IAM users for them. The role is assumed via AWS Security Token Service (STS), which issues temporary credentials that expire after a defined duration, ensuring least-privilege access.
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.
✗
IAM Groups
Why it's wrong here
IAM Groups organize existing IAM users with shared permissions — they don't grant access to non-AWS-account holders.
✓
IAM Roles with cross-account access
Why this is correct
IAM Roles with STS AssumeRole grant temporary credentials to external identities without requiring permanent IAM users, with fine-grained permissions and automatic expiration.
Related concept
Read the scenario before looking for a memorised answer.
✗
IAM password policies
Why it's wrong here
Password policies govern password complexity for existing IAM users — they don't grant access to external parties.
✗
Service Control Policies (SCPs)
Why it's wrong here
SCPs are AWS Organizations policies that restrict permissions within member accounts — they don't grant access to external parties.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse IAM Roles with cross-account access with IAM Groups, thinking groups can be used to grant permissions to external users, but groups only apply to IAM users within your own account.
Detailed technical explanation
How to think about this question
When a third-party contractor assumes a cross-account role, AWS STS generates temporary security credentials consisting of an access key ID, secret access key, and session token, which are valid for a configurable duration (default 1 hour, max 12 hours). The trust policy on the role explicitly defines which external accounts or identity providers can assume it, and the permissions policy controls what actions the contractor can perform. This mechanism is defined in the AWS Identity and Access Management (IAM) documentation and relies on the AWS Signature Version 4 signing process for API requests.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
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: IAM Roles with cross-account access — IAM Roles with cross-account access allow you to grant temporary, limited permissions to users from another AWS account or external identity providers (e.g., third-party contractors) without creating IAM users for them. The role is assumed via AWS Security Token Service (STS), which issues temporary credentials that expire after a defined duration, ensuring least-privilege access.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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