Data Science Prerequisites - Numpy, Matplotlib, and Pandas in Python - Selecting Rows and Columns

The video tutorial explains how to select rows and columns in a pandas DataFrame, comparing it to numpy array indexing. It covers column operations, data types, and row selection using iloc and loc. The tutorial also discusses boolean indexing, converting DataFrames to numpy arrays, and saving DataFrames to CSV files.

What is the correct way to check the column names of a data frame?

• DF.get_columns()

• DF.columns

• DF.columns()

• DF['columns']

What does the square bracket notation return when used with a single column name?

• A DataFrame

• A Series

• An array

• A list

How does the iloc attribute differ from the loc attribute?

• iloc uses index labels, loc uses integer indices

• Both use index labels

• iloc uses integer indices, loc uses index labels

• Both use integer indices

What type of object is returned when selecting a single row or column from a data frame?

• Array

• Series

• List

• DataFrame

How can you select rows where a column value meets a specific condition?

• Using a for loop

• Using loc with a condition

• Using iloc with a condition

• Using square brackets with a boolean series

What attribute is used to convert a data frame to a numpy array?

• DF.to_numpy()

• DF.array()

• DF.values

• DF.to_array()

How can you save a data frame to a CSV file without the index column?

• Use to_csv with index=0

• Use to_csv with remove_index=True

• Use to_csv with no_index=True

• Use to_csv with index=False