CBSE SQP 2025-26

Question

**Assertion (A):** The output of `print(df)` and `print(df.loc[:])` will be the same for a DataFrame `df`.

**Reason (R):** The statement `print(df.loc[:])` will display all rows and columns of the DataFrame `df`, thus showing the entire data.

Choose the correct option:
- **(A)** Both A and R are True, and R correctly explains A.
- **(B)** Both A and R are True, but R does not correctly explain A.
- **(C)** A is True, but R is False.
- **(D)** A is False, but R is True. A). Both A and R are True, and R correctly explains A. B). Both A and R are True, but R does not correctly explain A. C). A is True, but R is False. D). A is False, but R is True.

Edvaya · Accepted Answer

The correct answer is Both A and R are True, and R correctly explains A.. **Assertion (A) is True**: `print(df)` and `print(df.loc[:])` produce identical output — both display the entire DataFrame. **Reason (R) is True and correctly explains A**: The `loc[:]` slice notation (with no start or stop specified) means "select from the very beginning to the very end", effectively selecting all rows and all columns. This is exactly equivalent to referencing the DataFrame directly. ```python import pandas as pd df = pd.DataFrame({'A': [1, 2], 'B': [3, 4]}) print(df) # Same output print(df.loc[:]) # Same output ```

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Informatics Practices > Data Handling And Visualization > Data Handling Using Pandas

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