- A
The Lambda function does not have the necessary IAM permissions
Why wrong: Permissions errors would be AccessDeniedException, not ValidationException.
- B
The modelId is not available in the current AWS region
Why wrong: Availability errors typically say 'model not found' or mention region, not an enum violation.
- C
The modelId is not part of the allowed enum of models for the account
The error explicitly states the value must satisfy the enum set, meaning the model ID is invalid or not in the allowed list.
- D
The modelId is deprecated and has been renamed
Why wrong: A deprecated model would still be accepted until removed; the error is specifically about not matching the enum.
Question 872 of 1,000
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.
A developer invoked an Amazon Bedrock model and received the following error: 'ValidationException: 1 validation error detected: Value 'claude-instant-v1' at 'modelId' failed to satisfy constraint: Member must satisfy enum value set: [ai21.j2-mid-v1, amazon.titan-text-lite-v1, anthropic.claude-v2, ...]'. What is the likely cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The modelId is not part of the allowed enum of models for the account
Option C is correct because the error message explicitly states that the value 'claude-instant-v1' at 'modelId' failed to satisfy the constraint: 'Member must satisfy enum value set'. This indicates that the modelId provided is not part of the allowed list of model identifiers that the Amazon Bedrock API accepts for the invocation request. The error is a validation error from the API itself, not a permissions or availability issue, meaning the modelId string does not match any entry in the predefined enum of supported models.
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 Lambda function does not have the necessary IAM permissions
Why it's wrong here
Permissions errors would be AccessDeniedException, not ValidationException.
- ✗
The modelId is not available in the current AWS region
Why it's wrong here
Availability errors typically say 'model not found' or mention region, not an enum violation.
- ✓
The modelId is not part of the allowed enum of models for the account
Why this is correct
The error explicitly states the value must satisfy the enum set, meaning the model ID is invalid or not in the allowed list.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The modelId is deprecated and has been renamed
Why it's wrong here
A deprecated model would still be accepted until removed; the error is specifically about not matching the enum.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse a validation error (enum constraint) with a regional availability or permissions issue, but the specific error message 'Member must satisfy enum value set' directly points to an invalid model identifier string, not a missing resource or authorization failure.
Detailed technical explanation
How to think about this question
Amazon Bedrock's InvokeModel API validates the 'modelId' parameter against a strict enum of supported model ARNs or identifiers, which is defined per region and account. This validation occurs before any model loading or inference, so even if the model exists elsewhere, an invalid string triggers a 'ValidationException' immediately. In practice, developers often mistype model IDs (e.g., 'claude-instant-v1' vs 'anthropic.claude-instant-v1') or use a model that has been removed from the enum due to deprecation, but the error message here confirms the value is simply not in the allowed set.
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.
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FAQ
Questions learners often ask
What does this AIF-C01 question test?
Fundamentals of Generative AI — This question tests Fundamentals of Generative AI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The modelId is not part of the allowed enum of models for the account — Option C is correct because the error message explicitly states that the value 'claude-instant-v1' at 'modelId' failed to satisfy the constraint: 'Member must satisfy enum value set'. This indicates that the modelId provided is not part of the allowed list of model identifiers that the Amazon Bedrock API accepts for the invocation request. The error is a validation error from the API itself, not a permissions or availability issue, meaning the modelId string does not match any entry in the predefined enum of supported models.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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