The answer is that the IAM role lacks the bedrock:ListFoundationModels permission. This is the most likely cause because the AccessDeniedException error specifically occurs when an IAM identity attempts to call the ListFoundationModels API operation without the corresponding action being allowed in an attached policy. Amazon Bedrock enforces granular IAM permissions for every API call, so even if the role has other Bedrock permissions, omitting this specific action will block the command. On the AWS Certified AI Practitioner AIF-C01 exam, this scenario tests your understanding of how IAM policies control access to Bedrock’s foundational model operations—a common trap is assuming that broader permissions like bedrock:* or a full administrator policy are needed, when in fact only the precise action is required. For a quick memory tip, think “List needs List”: any API call starting with “List” demands a matching “List” permission in your IAM policy.
AIF-C01 Applications of Foundation Models Practice Question
This AIF-C01 practice question tests your understanding of applications of foundation models. 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.
Network Topology
Refer to the exhibit. A developer runs this command but gets an error: 'An error occurred (AccessDeniedException) when calling the ListFoundationModels operation'. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The IAM role does not have bedrock:ListFoundationModels permission
The error 'AccessDeniedException' when calling ListFoundationModels indicates that the IAM role or user executing the AWS CLI command lacks the required permission to list foundation models in Amazon Bedrock. The specific permission needed is bedrock:ListFoundationModels, which must be attached to the IAM identity via a policy. Without this permission, the API call is denied regardless of other factors like region or CLI version.
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.
✓
The IAM role does not have bedrock:ListFoundationModels permission
Why this is correct
AccessDeniedException is due to missing IAM permissions.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The AWS CLI version is outdated
Why it's wrong here
CLI version would cause a different error, not AccessDenied.
✗
The foundation model is not available in us-west-2
Why it's wrong here
Model availability would give a different error, not AccessDenied.
✗
The region us-west-2 does not support Bedrock
Why it's wrong here
us-west-2 supports Bedrock.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the distinction between service availability errors (e.g., region not supported) and IAM permission errors, where candidates mistakenly attribute an AccessDeniedException to regional or model availability issues rather than missing IAM permissions.
Detailed technical explanation
How to think about this question
Amazon Bedrock uses AWS Identity and Access Management (IAM) to control access to its APIs, including ListFoundationModels. The bedrock:ListFoundationModels permission is part of the Bedrock API actions and must be explicitly granted in an IAM policy; simply having Bedrock service access does not imply permission to list models. In practice, this error often occurs when developers use a role with insufficient scoping, such as a role that only allows invoking specific models but not listing them, which is a common misconfiguration in multi-account or least-privilege setups.
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.
Applications of Foundation Models — This question tests Applications of Foundation Models — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The IAM role does not have bedrock:ListFoundationModels permission — The error 'AccessDeniedException' when calling ListFoundationModels indicates that the IAM role or user executing the AWS CLI command lacks the required permission to list foundation models in Amazon Bedrock. The specific permission needed is bedrock:ListFoundationModels, which must be attached to the IAM identity via a policy. Without this permission, the API call is denied regardless of other factors like region or CLI version.
What should I do if I get this AIF-C01 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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