The answer is to change the Resource to arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-v2. This is correct because an IAM policy’s Resource element specifies exactly which AWS resource the allowed actions can affect; when troubleshooting Bedrock IAM policy resource ARN issues, the ARN must match the specific foundation model you intend to invoke. On the AWS Certified AI Practitioner AIF-C01 exam, this tests your understanding that each Bedrock model has a unique ARN, and a common trap is assuming a wildcard or a generic resource like “*” will work for invocation—it won’t, because the runtime action requires an exact model ARN. A helpful memory tip: think of the Resource ARN as the model’s “phone number”—you can’t call Claude if you’ve only dialed Titan.
AIF-C01 Fundamentals of Generative AI Practice Question
This AIF-C01 practice question tests your understanding of fundamentals of generative ai. 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.
Refer to the exhibit. A developer has attached this IAM policy to their user. When trying to invoke the Anthropic Claude v2 model using the Bedrock runtime, they receive an AccessDeniedException. Which change to the policy would resolve the issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the Resource to arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-v2
The policy grants access only to the Titan model resource. To invoke Claude v2, the resource must match the Claude model ARN. Adding other actions or removing the resource condition would not grant the correct access; listing models does not allow invocation.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Add the bedrock:InvokeModelWithResponseStream action
Why it's wrong here
Incorrect. This action is for streaming responses; the issue is resource restriction, not action.
✗
Change the Action to bedrock:ListFoundationModels
Why it's wrong here
Incorrect. This action lists models but does not allow invocation.
✓
Change the Resource to arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-v2
Why this is correct
Correct. This ARN matches the Claude v2 model, allowing invocation.
Related concept
Standard ACLs match source addresses.
✗
Remove the Resource element and set Effect to Deny
Why it's wrong here
Incorrect. Removing Resource would allow all resources if combined with Allow, but setting Effect to Deny would block all access.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related AIF-C01 ACL questions on filtering logic and placement.
Fundamentals of Generative AI — This question tests Fundamentals of Generative AI — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Change the Resource to arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-v2 — The policy grants access only to the Titan model resource. To invoke Claude v2, the resource must match the Claude model ARN. Adding other actions or removing the resource condition would not grant the correct access; listing models does not allow invocation.
What should I do if I get this AIF-C01 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related AIF-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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