Data Science MCQs with Answers 2026

1. Data Science combines:

a) Only programming    b) Statistics, programming, and domain knowledge ✅    c) Only math    d) Only visualization

2. Big Data refers to:

a) Small datasets    b) Extremely large complex datasets ✅    c) A database software    d) A programming language

3. The 3 Vs of Big Data are:

a) Volume Velocity Variety ✅    b) Value Vision Verify    c) Virtual Visual Vocal    d) Version Vendor View

4. Mean is the:

a) Middle value    b) Most frequent    c) Average of all values ✅    d) Range

5. Median is the:

a) Average    b) Middle value when data is sorted ✅    c) Most frequent    d) Largest value

6. Mode is the:

a) Average    b) Middle value    c) Most frequently occurring value ✅    d) Smallest value

7. Standard deviation measures:

a) Average    b) How spread out data values are ✅    c) Total sum    d) Frequency

8. Pandas in Python is used for:

a) Web development    b) Data manipulation and analysis ✅    c) Game development    d) Operating systems

9. NumPy is used for:

a) Text processing    b) Numerical computing with arrays ✅    c) Web scraping    d) Database management

10. Matplotlib is used for:

a) Machine learning    b) Data visualization ✅    c) Web development    d) File management

11. Jupyter Notebook is:

a) A text editor    b) Interactive environment for writing and running code ✅    c) A database    d) An operating system

12. First step in data science:

a) Model building    b) Data collection and understanding the problem ✅    c) Deployment    d) Visualization

13. Data cleaning involves:

a) Adding more data    b) Handling missing values and inconsistencies ✅    c) Deleting dataset    d) Ignoring errors

14. EDA stands for:

a) Electronic Data Archive    b) Exploratory Data Analysis ✅    c) External Data Access    d) Encrypted Data Algorithm