AI / LLM Basics Interview Questions
What is Layer Normalization?
Layer Normalization is a technique used inside a Transformer to keep the scale of values flowing through the network stable as they pass through many stacked layers.
- Rescales the values within each layer's output to have a consistent mean and variance
- Helps training converge faster and more reliably, since wildly varying value scales can make gradient-based training unstable
- Applied at specific points within each Transformer block, typically before or after the attention and feed-forward steps
Without this kind of stabilization, training a network as deep as a modern LLM, often dozens of stacked layers, would be considerably harder to get working reliably.
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