Practice quiz: Notation and maths

4 questions. Pick an answer to see if it is right. You can try as many times as you like. These are for practice: the final test has different questions.

1. 1.In many ML papers, what does a hat on a symbol, like ŷ, usually mean?

   The true valueA prediction or estimateA matrixA constant
2. 2.In softmax(Q Kᵀ / √d_k) V, what does softmax do?

   Finds the largest score and discards the restTurns each row of scores into weights that add up to 1Multiplies by the valuesRemoves negative numbers
3. 3.Which part of a paper should you never skip?

   A long proof in the appendixThe assumptions behind the main resultA derivation of a standard formulaThe acknowledgements
4. 4.Why keep a symbol table while reading?

   Journals require itMost confusion comes from forgetting what a symbol meansTo count the equationsTo find typos