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Deep Learning · End Term · May 2024 · AN

Deep Learning · End Term · May 2024 AN

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Question 95 MCQ · 0.0 marks

**Note: If the base of log is not mentioned, use log base e.**
6406533044519.
Instructions has been mentioned above.
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This Instructions is just for a reference & not for an evaluation.

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Question 96 NAT · 2.0 marks

Source diagram or notation

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Question 97 NAT · 2.0 marks

Consider a dataset with 150 samples and a batch size of 15. If each minibatch iteration contributes an average loss of 0.4, what will be the total loss after 15 epochs?

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Question 98 NAT · 2.0 marks

If you use hierarchical softmax with a binary tree where each leaf node represents a word in the vocabulary, and the vocabulary size (V ) is 16000, how many binary classifiers are needed?

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Question 99 NAT · 2.0 marks

In a Skip-gram model with a vocabulary size V = 100, an embedding dimension D = 10, and a window size of 3 (on each side), using negative sampling with 5 negative samples per positive sample, what is the total number of parameters in the model?

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Question 100 NAT · 2.0 marks

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Question 101 NAT · 2.0 marks

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Question 102 NAT · 3.0 marks

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Question 103 NAT · 3.0 marks

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Question 104 NAT · 3.0 marks

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Question 105 NAT · 1.0 marks

What is the derivative of the ReLU activation function at x = 10?

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Question 106 MCQ · 1.0 marks

In terms of convergence speed, which gradient descent method can show the most rapid progress initially but may suffer from high variance in updates?
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Batch Gradient Descent
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Stochastic Gradient Descent
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Mini-batch Gradient Descent
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None of these

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Question 107 MCQ · 1.0 marks

How does the use of early stopping in training a neural network affect the model’s performance on unseen data?
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It usually leads to better performance on unseen data by preventing overfitting
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It generally worsens the performance on unseen data by halting training too early
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It does not affect the performance on unseen data
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It increases the risk of overfitting by allowing more epochs of training

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Question 108 MCQ · 2.0 marks

Which of the following statements is/are not true with respect to a dropout rate of 0.2?
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The exact number of neurons dropped in each iteration will always be exactly 20%.
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The exact number of neurons dropped and retained can vary slightly from one iteration to another due to the probabilistic nature of dropout.
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Each neuron has a 20% chance of being dropped during any given training iteration.
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Over many training iterations, the average percentage of retained neurons will approximate 80%.

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Question 109 MCQ · 2.0 marks

In the context of unsupervised pretraining of artificial neural networks, which of the following statements accurately describes the role and benefits of using unsupervised pretraining techniques for initializing a neural network?
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Unsupervised pretraining methods help in identifying patterns in unlabeled data, which can be used to initialize weights and reduce the risk of overfitting in the subsequent supervised training phase.
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The primary purpose of unsupervised pretraining is to generate synthetic data that can be used to expand the training dataset for the neural network, leading to more robust performance.
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Unsupervised pretraining enables the network to learn a hierarchical representation of data, which can be fine-tuned with supervised learning, enhancing the model’s generalization capabilities.
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Using unsupervised pretraining techniques ensures that the neural network can skip the initial training phase, directly achieving high accuracy on test data without further training.

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Question 110 MCQ · 2.0 marks

What are the maximum values of the derivatives of sigmoid and tanh?
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1, 1
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0.5, 0.5
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0, 0.5
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0.5, 0
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0.25, 1
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0.25, 0.5

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Question 111 MCQ · 2.0 marks

Source diagram or notation
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-0.477, 0
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-0.301, 0
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0.301, 0
6406533044554.
0.477, 0.477
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-0.477, 0.477

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Question 112 MCQ · 2.0 marks

Given a matrix A with dimensions p × q, which of the following statements is NOT true regarding the rank-k approximation of A obtained through Singular Value Decomposition (SVD)?
6406533044556.Source diagram or notation
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6406533044559.Source diagram or notation

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Question 113 MCQ · 2.0 marks

Consider an encoder-decoder model trained with a batch size of 64. Each input sequence has a length of 12 tokens, and each output sequence has a length of 18 tokens. How many computational steps do the encoder and decoder take per batch respectively during training?
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768, 1152
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1152, 768
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12, 18
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18, 12
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12, 1
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1, 18

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Question 114 MCQ · 2.0 marks

In an encoder-decoder model, what is the significance of the context vector?
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It stores the hidden states of the decoder.
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It summarizes the input sequence information to be used by the decoder.
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It acts as the final output of the decoder.
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It initiates the hidden states of the encoder.
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It contains the parameters of the attention mechanism.

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Question 115 MCQ · 2.0 marks

Given the attention weights αt,1 = 0.3, αt,2 = 0.4, αt,3 = 0.3 and the corresponding encoder hidden states h1 = [2, 1, 0], h2 = [1, 2, 1], h3 = [0, 1, 2], calculate the context vector ct.
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[0.7, 1.4, 0.9]
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[1.1, 1.6, 1.3]
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[0.6, 1.3, 0.9]
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[1.1, 1.4, 1.1]

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Question 116 MCQ · 2.0 marks

In the Transformer model, what is the purpose of the multi-head attention mechanism?
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To allow the model to focus on different parts of the input sequence using different sets of attention weights.
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To average the attention weights across multiple heads for more stable training.
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To reduce the dimensionality of the input sequence before applying attention.
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To apply attention in parallel across multiple layers of the Transformer model.

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Question 117 MSQ · 2.0 marks

In the context of the Transformer model’s encoder-decoder architecture, which of the following statements are correct?
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The encoder processes the entire input sequence at once at a particular time step, and its output serves as the context for the decoder during generation.
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The multi-head attention mechanism in the decoder allows the model to focus on different parts of the encoder’s output while generating the sequence.
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The decoder applies self-attention over its entire sequence of inputs without any restrictions, allowing it to consider all future tokens at once.
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The decoder’s self-attention mechanism includes a masking component to prevent attending to future positions, ensuring the model generates outputs one step at a time.

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Question 118 NAT · 2.0 marks

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Based on the above data, answer the given subquestions.
Given that the GRU processes sequences of length 6 (T = 6), what is the total number of parameters (including biases) in the network?

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Question 119 MCQ · 2.0 marks

Source diagram or notation
Based on the above data, answer the given subquestions.
Source diagram or notation
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6406533044564.Source diagram or notation

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Question 120 MCQ · 2.0 marks

Source diagram or notation
Based on the above data, answer the given subquestions.
Source diagram or notation
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3 × 2
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3 × 4
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4 × 3
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2 × 4       **Programming in C** **Section Id :** 64065364134 **Section Number :** 6 **Section type :** Online **Mandatory or Optional :** Mandatory **Number of Questions :** 26 **Number of Questions to be attempted :** 26 **Section Marks :** 100 **Display Number Panel :** Yes **Section Negative Marks :** 0 **Group All Questions :** No **Enable Mark as Answered Mark for Review and** No **Clear Response :** **Maximum Instruction Time :** 0

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