Machine Learning Techniques Unit 3 – Decision Tree Learning and Instance-Based Learning: AKTU previous year questions
12 AKTU questions from Unit 3 (Decision Tree Learning and Instance-Based Learning) asked in 2025–2026, tagged by marks, year and topic. In short: about 25 marks of every paper come from this unit; the most asked topic is Issues in Decision Tree Learning (7 times); 7 questions came back in a later year. The latest ones are listed below; on the page you can filter them by 2-mark or long questions, topic and repeats.
Unit 3 previous year questions
- Explain the concept of overfitting in Decision Trees? (2 marks, 2026, Issues in Decision Tree Learning)
- What is Entropy in Decision Tree Learning? (2 marks, 2026, Entropy and Information Theory)
- Define k-Nearest Neighbor algorithm. (2 marks, 2026, k-Nearest Neighbour Learning)
- Discuss Information Gain and its role in Decision Tree Learning. (7 marks, 2026, Information Gain)
- Explain k-Nearest Neighbour (k-NN) algorithm and its limitations. (7 marks, 2026, k-Nearest Neighbour Learning)
- Explain the ID3 algorithm for Decision Tree learning. (7 marks, 2026, ID-3 Algorithm)
- Discuss inductive bias and inductive inference in decision trees. (7 marks, 2026, Inductive Inference with Decision Trees)
- Explain ID3 Algorithm with an example. (7 marks, 2026, ID-3 Algorithm)
- Discuss k-Nearest Neighbor and Locally Weighted Regression. (7 marks, 2026, Locally Weighted Regression)
- What is overfitting in decision tree learning, and how can it be avoided? (2 marks, 2025, Issues in Decision Tree Learning)
- What is inductive bias? (2 marks, 2025, Inductive Bias)
- Illustrate the steps of the ID3 algorithm, including how it selects attributes and constructs the tree. (7 marks, 2025, ID-3 Algorithm)
Most asked Unit 3 topics
- Issues in Decision Tree Learning – asked 7 times
- k-Nearest Neighbour Learning – asked 6 times
- ID-3 Algorithm – asked 4 times
Unit 3 question pattern
- 2-mark questions: 5 asked in 2025–2026
- 7-mark questions: 7 asked in 2025–2026
- About 25 marks from Unit 3 in every paper
- 7 questions were asked again in a later year
Unit 3 questions year by year
- 2026: 9 Unit 3 questions asked (48 marks across that year's papers)
- 2025: 3 Unit 3 questions asked (11 marks across that year's papers)