# NPTEL Introduction To Machine Learning – IITKGP Assignment 6 Answers

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### NPTEL Introduction To Machine Learning – IITKGP Week 6 Assignment 6 Answer 2022 :-

#### Q1. In training a neural network, we notice that the loss does not increase in the first few starting epochs: What is the reason for this?

• The learning Rate is low.
• Regularization Parameter is High.
• Stuck at the Local Minima.
• All of these could be the reason.

#### Q.2. What is the sequence of the following tasks in a perception?

I) Initialize the weights of the perceptron randomly. II) Go to the next batch of data set. III) If the prediction does not match the output, change the weights. IV) For a sample input, compute an output.
• I, II, II, IV
• IV, III, II,I
• III, I, II, IV
•  I, IV, III, II

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#### Q.3. Suppose you have inputs as x, y, and z with values -2, 5, and -4 respectively. You have a neuron ‘q’ and neuron ‘f’ with functions:

q = x + y f = q * z Graphical representation of the functions is as follows: What is the gradient of F with respect to x, y, and z?
• (-3, 4, 4)
• (4, 4, 3)
• (4,-4,3)
• (3,-4,4)

#### What will be the final equation?

• (h1 AND NOT h2) OR (NOT h1 AND h2)
• (h1 OR NOT h2) AND (NOT hl OR h2)
• (h1 AND h2) OR (hi OR h2)
• None of these.

#### Q.5. Which of the following is true about model capacity (where model capacity means the ability of neural network to approximate complex functions)?

• As number of hidden layers increase, model capacity increases
• As dropout ratio increases, model capacity increases
• As learning rate increases, model capacity increases
• None of these.
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• Answer: B

#### Q.7. Which of the following is true? Single layer associative neural networks do not have the ability to

I) Perform pattern recognition II) Find the parity of a picture III) Determine whether two or more shapes in a picture are connected or not
• II and III are true
• II is true
• All of the above
• None of the above.

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#### Q.8. The network that involves backward links from outputs to the inputs and hidden layers is called as

• Self-organizing Maps
• Perceptron
• Recurrent Neural Networks
• Multi-Layered Perceptron

• Yes
• No

#### Q.10. What is meant by the statement “Backpropagation is a generalızed delta rule”?

• Because backpropagation can be extended to hidden layer units
• Because delta is applied to only to input and output layers, thus making it more generalized.
• It has no significance
• None of the above.

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#### About NPTEL Introduction To Machine Learning – IITKGP Course:

This course provides a concise introduction to the fundamental concepts in machine learning and popular machine learning algorithms. We will cover the standard and most popular supervised learning algorithms including linear regression, logistic regression, decision trees, k-nearest neighbour, an introduction to Bayesian learning and the naïve Bayes algorithm, support vector machines and kernels and neural networks with an introduction to Deep Learning. If you have not registered for exam kindly register Through https://examform.nptel.ac.in/2022_04/exam_form/ COURSE LAYOUT The course structure and content covers, over a period of 8 weeks:
• Week 1: Introduction: Basic definitions, types of learning, hypothesis space and inductive bias, evaluation, cross-validation
• Week 2: Linear regression, Decision trees, overfitting
• Week 3: Instance based learning, Feature reduction, Collaborative filtering based recommendation
• Week 4: Probability and Bayes learning
• Week 5: Logistic Regression, Support Vector Machine, Kernel function and Kernel SVM
• Week 6: Neural network: Perceptron, multilayer network, backpropagation, introduction to deep neural network
• Week 7: Computational learning theory, PAC learning model, Sample complexity, VC Dimension, Ensemble learning
• Week 8: Clustering: k-means, adaptive hierarchical clustering, Gaussian mixture model
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