Machine Learning MCQs with Answers 2026

1. Machine Learning is a subset of:

a) Database systems    b) Artificial Intelligence ✅    c) Networking    d) Operating Systems

2. Supervised learning data includes:

a) Only inputs    b) Only outputs    c) Both inputs and correct outputs (labeled) ✅    d) No data

3. Unsupervised learning is used when:

a) Labels available    b) Data has no labels ✅    c) Only one data point    d) Testing only

4. Overfitting means:

a) Model too simple    b) Model works on training data but fails on new data ✅    c) Model is balanced    d) Model has no errors

5. Linear Regression is used for:

a) Classification    b) Predicting continuous numerical values ✅    c) Clustering    d) Image recognition

6. Logistic Regression is used for:

a) Predicting numbers    b) Binary classification ✅    c) Clustering    d) Sorting

7. K-Means is an algorithm for:

a) Classification    b) Clustering ✅    c) Regression    d) Sorting

8. Decision Tree makes predictions by:

a) Random guessing    b) Splitting data based on feature values ✅    c) Neural networks    d) Linear equations

9. Deep Learning uses:

a) Simple rules    b) Neural networks with multiple hidden layers ✅    c) Spreadsheets    d) Decision trees only

10. CNN is used for:

a) Text processing    b) Image processing ✅    c) Audio only    d) Database

11. RNN is used for:

a) Image processing    b) Sequential data like text/speech ✅    c) Database    d) File systems

12. Accuracy in ML is:

a) Training speed    b) Percentage of correct predictions ✅    c) Dataset size    d) Number of features

13. Training set is used to:

a) Test model    b) Train/teach the model ✅    c) Deploy model    d) Delete model

14. Test set is used to:

a) Train model    b) Evaluate model on unseen data ✅    c) Clean data    d) Visualize data