🚀 Top 100 AI Interview Questions

🧠 AI Fundamentals

1. Can you explain what Artificial Intelligence is in simple terms?
2. What is the difference between Artificial Intelligence, Machine Learning, and Deep Learning?
3. What are the different types of AI?
4. Can you explain the difference between Narrow AI and General AI?
5. What are Intelligent Agents in AI?
6. How does an AI system make decisions?
7. What is heuristic search in AI?
8. What is the difference between Breadth-First Search and Depth-First Search?
9. Can you explain a real-world application of AI that you use daily?
10. Why is AI becoming important across industries?

📊 Machine Learning Basics

11. What is Machine Learning and how does it work?
12. What are the different types of Machine Learning?
13. What is the difference between supervised and unsupervised learning?
14. Can you explain reinforcement learning with a real-world example?
15. What is the difference between training data and testing data?
16. Why do we split data into train and test sets?
17. What is overfitting in Machine Learning?
18. What is underfitting and how can you detect it?
19. Can you explain the bias-variance tradeoff?
20. What is feature engineering and why is it important?

📈 Regression

21. What is Linear Regression and where is it used?
22. What assumptions does Linear Regression make?
23. What is multicollinearity and why is it a problem?
24. What is Ridge Regression?
25. What is Lasso Regression?
26. What is the difference between Ridge and Lasso Regression?
27. How do you evaluate a regression model?
28. What is RMSE and why is it important?
29. What does R² score tell you about a model?
30. When would you choose regression over classification?

🔍 Classification

31. What is a classification problem in Machine Learning?
32. What is the difference between Logistic Regression and Linear Regression?
33. How does a Decision Tree work?
34. What are the advantages of Random Forest?
35. What is Support Vector Machine (SVM)?
36. Why is Naive Bayes called “naive”?
37. How does the KNN algorithm work?
38. What is a confusion matrix?
39. What is the difference between precision and recall?
40. Why is F1-score important?

📉 Clustering & Unsupervised Learning

41. What is clustering in Machine Learning?
42. How does K-Means clustering work?
43. What is hierarchical clustering?
44. What is DBSCAN and when would you use it?
45. What is dimensionality reduction?
46. What is PCA and why is it used?
47. What is the difference between PCA and clustering?
48. What is anomaly detection?
49. Can you explain association rule learning with an example?
50. What are some real-world applications of clustering?

🧠 Deep Learning

51. What is Deep Learning and how is it different from Machine Learning?
52. What is a Neural Network?
53. Can you explain how a perceptron works?
54. What are activation functions and why are they needed?
55. Why is ReLU widely used in Deep Learning?
56. What is backpropagation in neural networks?
57. How does gradient descent optimize a model?
58. What is the vanishing gradient problem?
59. What is dropout in Deep Learning?
60. What is the difference between CNN and RNN?

💬 Natural Language Processing (NLP)

61. What is NLP and where is it used?
62. What is tokenization in NLP?
63. Why do we remove stopwords in text preprocessing?
64. What is stemming?
65. What is lemmatization and how is it different from stemming?
66. What is TF-IDF and why is it useful?
67. What are word embeddings?
68. Can you explain sentiment analysis with an example?
69. What are transformers in NLP?
70. What is a Large Language Model (LLM)?

👁️ Computer Vision

71. What is Computer Vision?
72. What is image classification?
73. What is object detection and how is it different from image classification?