AI-300 Certification Practice Question #4

Question

You have a deployment of an Azure OpenAI Service base model.
You plan to fine-tune the model.
You need to prepare a file that contains training data.
Which file format should you use?

Accepted Answer

Azure OpenAI / Foundry fine-tuning mandates a **JSON Lines (JSONL)** file where each line is a complete training example in Chat Completions format. CSV and TSV can't represent nested message structures, and a plain JSON document isn't the required line-delimited format. The official docs state the requirement explicitly.

More AI-300 practice questions