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AI-102 Practice Question: Implement knowledge mining and information extraction solutions

Your company has a large collection of legal contracts in PDF format stored in Azure Blob Storage. You need to extract key clauses, parties, and effective dates using a custom model in Azure AI Document Intelligence. The model must be retrained monthly as new contract templates are added. What is the recommended approach to handle model versioning and retraining?

⚠ Common exam trap

Many candidates assume retraining from scratch (Option C) is the only way to incorporate new data, overlooking the 'compose' operation and model copying features that enable incremental updates without losing prior training.

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

Train a new model version using the 'compose' operation or copy the existing model and retrain with new samples

Azure AI Document Intelligence supports model versioning through the 'compose' operation, which allows you to combine multiple trained models into a single composed model, or by copying an existing model and retraining it with new samples. This approach preserves the existing model's knowledge while incrementally updating it with new contract templates, avoiding the need to retrain from scratch each month.

Answer analysis

Option-by-option breakdown

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

  • Train a new model version using the 'compose' operation or copy the existing model and retrain with new samples

    Why this is correct

    Model composition allows building on top of existing models.

  • Use a multi-model ensemble by training separate models per template

    Why it's wrong here

    Not the recommended approach; a single model can handle multiple templates.

  • Retrain the model from scratch each month using all historical data

    Why it's wrong here

    Inefficient and could lose previously learned patterns.

  • Use Azure Machine Learning pipelines to automate retraining and deploy a new endpoint

    Why it's wrong here

    Not directly supported for Document Intelligence custom models.

Quick reference

Azure Blob Storage Tier Comparison

TierStorage CostRetrieval CostLatencyUse Case
HotHighestLowestImmediateActive data, frequent reads
CoolLowerHigherImmediateData accessed < once / month
ColdLower stillHigherImmediateData accessed < once / quarter
ArchiveLowestHighest + rehydration delayHoursLong-term compliance retention

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