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MLT · End Term · 13 Apr 2025 (Afternoon)

17 questions · 50 marks · 90 min

Answer key Take as mock

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Machine Learning Techniques

End Term · 13 Apr 2025 (Afternoon)

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
MSQ: One or more options correct. Select all to score.
NAT: Numerical response. No negative marking.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Q1MSQ2 Marks·Choose all correct options
Asked 2 times Key ↓
What is the role of the regularization term in ridge regression?
1. AIt ensures that the dataset is normally distributed.
2. BIt penalizes large coefficients to reduce overfitting.
3. CIt forces more coefficients to be exactly zero, performing feature selection.
4. DIt increases the variance of the model.
Q2MSQ2 Marks·Choose all correct options
Key ↓
Which of the following conditions must be satisfied for a decision tree to be pure at a given node?
1. AThe entropy of the node is maximum.
2. BThe information gain at the node is negative.
3. CAll samples at a node belong to the same class.
4. DThe entropy of the node is 0.
Q3MCQ3 Marks·Choose one option
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q4MCQ3 Marks·Choose one option
Asked 3 times Key ↓
1. A
2. B
3. C
Q5MCQ2 Marks·Choose one option
Key ↓
1. AKernel PCA with a polynomial kernel of degree 2.
2. BKernel PCA with a polynomial kernel of degree 3.
3. CKernel PCA with a polynomial kernel of degree 4.
4. DStandard PCA
Q6MCQ1 Mark·Choose one option
Key ↓
Weak learners used in the ensemble method typically perform slightly better than random guessing.
1. ATRUE
2. BFALSE
Q7MSQ3 Marks·Choose all correct options
Key ↓
1. AModel 1 will have a higher bias than Model 2.
2. BModel 2 will have a lower variance than Model 1.
3. CModel 1 is more likely to underfit.
4. DModel 1 is more likely to overfit.
Q8MSQ3 Marks·Choose all correct options
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
5. E
Q9MSQ4 Marks·Choose all correct options
Asked 3 times Key ↓
1. A
2. B
3. C
4. D
5. E
6. F
Q10NAT4 Marks·Write the number
Key ↓
Your answer:
Q11NAT4 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q12NAT4 Marks·Write the number
Asked 4 times Key ↓
Your answer:
Q13NAT4 Marks·Write the number
Key ↓
The following dataset represents different weather conditions and the corresponding decision on whether a person chooses to play tennis:
Your answer:
Q14NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q15NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Read the passage below, then answer Q16–Q17
Based on the above data, answer the given subquestions.
Q16MCQ2 Marks·Choose one option
Key ↓
Which classifier has the lower training error?
1. A
2. B
Q17MCQ3 Marks·Choose one option
Asked 3 times Key ↓
1. A
2. B
3. C
4. D

Official Key

Master Answer Key & Explanations

Official answer keys from IIT Madras BS past papers. Click any question to review.

Reveal Key

Q1B

Q2C, D

Q3B

Q4A

Q5B

Q6A

Q7A, C

Q8B, D, E

Q9B, E

Q10262.2 to 262.8

Q110.148 to 0.154

Q124

Q130.61 to 0.67

Q141

Q151

Q16A

Q17B

Questions and answer keys are reproduced from the official IIT Madras BS papers. BTechi is not affiliated with IIT Madras.