Pandas, NumPy, and Matplotlib Basics Quiz

Which of the following is the primary data structure in Pandas?

• List

• DataFrame

• Array

• Series

What does the pandas.read_csv() function do?

• Writes data to a CSV file

• Reads data from a CSV file

• Converts a CSV file into a NumPy array

• Plots data from a CSV file

How can you select a single column from a DataFrame in Pandas?

• df.column_name

• df[column_name]

• df['column_name']

• df(column_name)

Which function is used to remove missing values in a Pandas DataFrame?

• dropna()

• fillna()

• replace()

• drop()

Which method is used to display the first few rows of a DataFrame?

• df.head()

• df.tail()

• df.first()

• df.sample()

How do you apply a function to each element in a DataFrame column?

• df['column'].apply(function)

• df['column'].map(function)

• df['column'].filter(function)

• df['column'].reduce(function)

What does the groupby() function do in Pandas?

• Sorts the DataFrame by the specified column

• Groups the DataFrame by the specified column and aggregates data

• Filters rows based on a condition

• Combines multiple DataFrames into one

What is the primary data structure in NumPy?

• DataFrame

• Array

• List

• Series

How do you create a NumPy array filled with zeros?

• np.zeros((shape))

• np.ones((shape))

• np.empty((shape))

• np.zeros_like((shape))

Which function is used to find the mean of elements in a NumPy array?

• np.mean()

• np.median()

• np.mode()

• np.average()