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MLT · End Term · 31 Aug 2025 (Forenoon)

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 · 31 Aug 2025 (Forenoon)

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.

Q1MCQ3 Marks·Choose one option
Key ↓
1. APCA has reduced the dimensionality of the dataset because the combinations of features are de-correlated.
2. BPCA has not reduced the dimensionality of the dataset because all principal components are retained.
3. CPCA always reduces the dimensionality of the dataset regardless of the number of components retained.
4. DPCA can never be used for dimensionality reduction.
Q2MCQ3 Marks·Choose one option
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q3MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q4MCQ2 Marks·Choose one option
Key ↓
1. A40
2. B60
3. C100
4. D1
Q5MSQ3 Marks·Choose all correct options
Key ↓
Which among the following is TRUE for k-NN algorithm? Select all that apply.
1. A1-nearest neighbour is sensitive to outliers.
2. Bk-NN can only be applied to a classification problem.
3. CAs k increases, the model is more likely to overfit.
4. DThe bias increases with the increase in the value of k.
5. EThe variance increases with the increase in the value of k.
Q6MSQ3 Marks·Choose all correct options
Key ↓
1. A30
2. B120
3. C50
4. D160
Q7MSQ3 Marks·Choose all correct options
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q8MSQ2 Marks·Choose all correct options
Asked 3 times Key ↓
With respect to the Lloyd’s algorithm, choose the correct statements:
1. AThe partition configurations cannot repeat themselves.
2. BAfter doing the reassignments (consider at least one point reassigned to the new cluster), we might get the same means for all clusters.
3. CObjective function after making the re-assignments strictly reduces.
4. DObjective function after making the re-assignments strictly increases.
Q9NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q10NAT4 Marks·Write the number
Asked 3 times Key ↓
Your answer:
Q11NAT4 Marks·Write the number
Asked 4 times Key ↓
Your answer:
Read the passage below, then answer Q12–Q13
Based on the above data, answer the given subquestions.
Q12MCQ4 Marks·Choose one option
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q13MCQ2 Marks·Choose one option
Asked 2 times Key ↓
1. AThe coefficients shrinks towards zero.
2. BThe coefficients increases in magnitude.
3. CThe coefficients remain unchanged.
Read the passage below, then answer Q14–Q15
Based on the above data, answer the given subquestions.
Q14NAT3 Marks·Write the number
Asked 2 times Key ↓
What is the probability that a 60-year-old patient with a cholesterol level of 200 mg/dL has the disease? Enter the answer correct to two decimal places.
Your answer:
Q15NAT3 Marks·Write the number
Asked 2 times Key ↓
How high should the cholesterol level be for the patient mentioned in the previous question to have a 50% chance of being diagnosed with the disease?
Your answer:
Read the passage below, then answer Q16–Q17
Consider the datapoints (−2,−2) with label +1 and (2, 2) with label −1. A hard margin SVM is applied on this dataset. Answer the given subquestions:
Q16MCQ2 Marks·Choose one option
Key ↓
Which of the following is the decision boundary for the given dataset?
1. A
2. B
3. C
4. D
Q17NAT2 Marks·Write the number
Asked 2 times Key ↓
Your answer:

Official Key

Master Answer Key & Explanations

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

Reveal Key

Q1B

Q2C

Q3D

Q4C

Q5A, D

Q6A, B, C

Q7B, D

Q8A, C

Q90.1 to 0.14

Q100.5

Q110.69 to 0.696

Q12D

Q13A

Q140.71 to 0.75

Q15150

Q16B

Q175.64 to 5.68

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