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Quiz · 4 questions

🧱 The Transformer Block

Pre-LN, RMSNorm, SwiGLU, residual — the unit cell

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Quiz

01What activation function do Llama and Mistral use in their FFN?
Hint
It uses gating and three weight matrices, not two.
02What normalization scheme do modern decoder-only LLMs typically use?
Hint
Modern means: norm comes before the sublayer, and the norm itself is simpler than the original.
03Where do most parameters live in a typical Transformer block?
Hint
Despite the name 'attention is all you need,' it's not where the params are.
04How many active parameters does Mixtral 8×22B use per forward pass?
Hint
Total params ≠ active params. Look at the routing K.
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