AIF-C01 Fundamentals of Generative AI Practice Question

Exhibit

Refer to the exhibit.

Exhibit:
```
{
  "outputText": "The quick brown fox...",
  "stopReason": "max_tokens"
}
```

A developer invoked an Amazon Bedrock model and received this output. What does the stopReason field indicate?

⚠ Common exam trap

The AWS AI Practitioner exam often tests the distinction between `max_tokens` (a user-set limit) and the model's natural completion (`end_turn`), tricking candidates into choosing 'natural stopping point' when the field explicitly indicates a forced truncation.

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 model reached the maximum token limit set in the request

The `stopReason` field in Amazon Bedrock model responses indicates why the model stopped generating tokens. When set to `end_turn` or `stop_sequence`, it means the model reached a natural stopping point or encountered a user-defined stop sequence. However, if the value is `max_tokens`, it explicitly means the model stopped because it reached the maximum token limit specified in the `max_tokens` request parameter. Option C correctly identifies this behavior.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
A content filter blocked the output
Why it's wrong here
Content filter stops are indicated by 'content_filtered'.
✗
The input prompt was too long
Why it's wrong here
Input length issues cause a different error, not captured in stopReason.
✓
The model reached the maximum token limit set in the request
Why this is correct
The stopReason 'max_tokens' explicitly indicates the output was truncated due to the token limit.
✗
The model reached a natural stopping point
Why it's wrong here
A natural stop would show 'stop' or 'end_turn', not 'max_tokens'.

Go deeper

AIF-C01 Fundamentals of Generative AI Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

Related to this question