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MLP · Decision trees & ensembles

8 questions · 23 marks · 1 paper

Answer key

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Machine Learning Practice

Decision trees & ensembles

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.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Q1MCQ2 Marks·Choose one option
Key ↓
1. AIt determines the number of features to select for each base model.
2. BIt controls the number of base learners (models) to train in the ensemble.
3. CIt decides the maximum number of samples to use in each base model.
4. DIt ensures randomness in the sample selection for each base model.
Q2MCQ2 Marks·Choose one option
Key ↓
1. AThe percentage of training samples used to train each base estimator.
2. BThe number of base estimators trained on subsets of the training data.
3. CThe maximum number of features used by each base estimator during training.
4. DThe total number of samples used to train all base estimators combined.
Q3MCQ2 Marks·Choose one option
Key ↓
1. AIt increases the variance among individual trees.
2. BIt decreases the variance among individual trees.
3. CIt reduces the number of samples used for training each tree.
4. DIt reduces overfitting by restricting tree depth.
Q4MCQ3 Marks·Choose one option
Key ↓
1. A[0]
2. B[1]
3. C[0.5]
4. D[2]
Q5MCQ3 Marks·Choose one option
Key ↓
1. AOutput score is likely to increase.
2. BOutput score is likely to decrease.
3. COutput score may increase or decrease depending on other factors.
4. DOutput score will remain the same.
Q6MCQ3 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q7MCQ4 Marks·Choose one option
Key ↓
1. A8
2. B16
3. C32
4. D64
Q8MSQ4 Marks·Choose all correct options
Key ↓
1. AThe number of samples at node N is 15. If split, the left child will have 10 samples, and the right child will have 5 samples.
2. BThe number of samples at node N is 8. If split, the left child will have 4 samples, and the right child will have 4 samples.
3. CThe number of samples at node N is 9. If split, the left child will have 2 samples, and the right child will have 7 samples.
4. DThe number of samples at node N is 14. If split, the left child will have 4 samples, and the right child will have 10 samples.
5. EThe number of samples at node N is 6. If split, the left child will have 3 samples, and the right child will have 3 samples.

Official Key

Master Answer Key & Explanations

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

Reveal Key

Q1B

Q2A

Q3B

Q4A

Q5B

Q6C

Q7B

Q8A, B, D

Questions and answer keys are reproduced from the official IIT Madras BS papers. Topics and repeated question types are BTechi’s own grouping. BTechi is not affiliated with IIT Madras.