DataX Jupyter Notebooks for Data Science Quiz

1. Which of the following is a best practice when documenting code in Jupyter Notebooks?

Use only code comments

Combine code cells with Markdown cells for explanations

Avoid using any documentation

Write all documentation in separate files

2. Which of the following is a recommended practice for organizing a data science Jupyter Notebook?

Mix all code and documentation randomly

Structure with clear sections: imports, data loading, analysis, visualization, conclusions

Use only code cells with no documentation

Avoid using headers or section breaks

3. In Jupyter, what does the %debug magic command allow you to do?

Automatically fix code errors

Enter the Python debugger after an exception

Display error messages only

Disable error reporting

4. Which of the following is true about kernel restarts in Jupyter Notebooks?

They clear all defined variables and reset execution state

They delete the notebook file

They cannot be performed manually

They save the notebook automatically

5. What is the purpose of the %pwd magic command in Jupyter?

To change the working password

To display the current working directory

To print all defined variables

To pause code execution

6. In Jupyter, what does pressing Tab after an incomplete variable name do?

Inserts a tab character

Provides autocomplete suggestions

Executes the cell

Deletes the variable

7. Which library is typically used for numerical computations and arrays in Jupyter?

Pandas

NumPy

Scikit-learn

BeautifulSoup

8. What does the %run magic command do in a Jupyter Notebook?

Executes the current cell

Runs an external Python script

Executes all cells in the notebook

Runs a shell command

9. In Jupyter, which method displays all available magic commands?

%help

%commands

%lsmagic

%list

10. What is the purpose of the %load_ext magic command in Jupyter?

To load external Python files

To load Jupyter extensions

To import libraries

To load datasets

11. What is the primary purpose of Jupyter Notebooks in data science?

To create static HTML reports only

To provide an interactive environment for code, documentation, and visualization

To replace Python entirely

To store data in cloud databases

12. In Jupyter, what does the %who magic command display?

Current username

List of all defined variables

Notebook author information

File directory structure

13. What does the keyboard shortcut Ctrl+Shift+Enter do in Jupyter?

Executes the current cell and inserts a new cell below

Deletes the current cell

Converts to Markdown

Saves the notebook

14. Which file format is used to save a Jupyter Notebook?

.py

.ipynb

.txt

.pdf

15. What is the purpose of the %timeit magic command in Jupyter?

To set a timer for your session

To measure execution time of code snippets

To display current time

To schedule notebook execution

16. In Jupyter, which cell type supports formatted text using Markdown syntax?

Code cell

Markdown cell

Python cell

Raw cell

17. What does the %matplotlib inline magic command do?

Imports the matplotlib library

Displays plots directly below code cells

Saves plots to a file

Disables plot rendering

18. Which library is most commonly used for data visualization in Jupyter Notebooks?