The answer
Usually, answering a question uses existing parameters. Updating those parameters requires a separate training procedure, although a product may independently store conversation history or collect feedback.
What does it mean to train a neural network?
Does a neural network learn every time it answers a question?
More FAQs in What does it mean to train a neural network?
An epoch is one complete pass through a training dataset. Large language model training may also be described by tokens processed or optimization steps.
Separate test data helps estimate performance on examples the model has not optimized against. Reusing test answers during development makes that estimate less trustworthy.
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