Comprehensive and Detailed Explanation From Exact AWS AI documents:
Continued pre-training involves training an already pre-trained model further using unlabeled, domain-specific data.
AWS generative AI guidance explains that continued pre-training:
Expands domain knowledge
Preserves general language understanding
Differs from fine-tuning, which uses labeled data
Why the other options are incorrect:
A describes fine-tuning.
C describes training from scratch.
D describes evaluation.
AWS AI document references:
Foundation Model Customization Techniques
Continued Pre-Training vs Fine-Tuning
Domain Adaptation on AWS
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