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Deep Learning Practice · Quiz 2 · 23 Nov 2025 · September 2025 term

Question 3: In the Wav2Vec2 pipeline, a 1-second (16000 samples) audi…

Question 3

+3 marksOne correct option

In the Wav2Vec2 pipeline, a 1-second (16000 samples) audio clip is passed to the 'Wav2Vec2Model' and results in a 'last hidden state' of shape (1, 49, 768). What do the dimensions 49 and 768 represent?

  1. A

    49 = number of possible phonemes; 768 = batch size.

  2. B

    49 = the model’s hidden dimension; 768 = the downsampled sequence length.

  3. C

    49 = the downsampled sequence length (timesteps); 768 = the model’s hidden feature dimension.

  4. D

    49 = number of attention heads; 768 = the vocabulary size.

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Correct answer

  • C

    49 = the downsampled sequence length (timesteps); 768 = the model’s hidden feature dimension.

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Question 3 of 15 in the IIT Madras BS Deep Learning Practice (Deep Learning Practice) Quiz 2 paper sat on 23 Nov 2025, in the September 2025 term (IIT M DEGREE AN EXAM QDB2 23 Nov 2025 NEW). It carries 3 marks.

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