What does head() function do in a Pandas Series?

• Returns the last five elements

• Returns the first five elements

• Returns a sorted Series

• Removes missing values

Which function is used to return the number of non-null elements in a Series?

• sort_values()

• count()

• median()

• fillna()

How can you get the sum of all values in a Pandas Series?

• sort_values()

• count()

• sum()

• fillna()

Which function is used to return the index positions sorted in ascending order?

• sort_values()

• sort_index()

• sum()

• fillna()

If you want to replace NaN values in a Series, which function should you use?

• sort_values()

• sort_index()

• dropna()

• fillna()

Which function removes missing (NaN) values from a Series?

• sort_values()

• sort_index()

• dropna()

• fillna()

How do you sort a Pandas Series by its values?

• sort_values()

• sort_index()

• dropna()

• fillna()

What does median() return?

• The sum of all values

• The maximum value in the Series

• The count of elements

• The middle value of the Series

What will s.count() return?

• 7

• 6

• 5

• 8

Which function would you use to replace None with the value 0?

s = pd.Series([3, 5, 7, None, 9])

• s.dropna(0)

• s.sort_values(0)

• s.fillna(0)

• s.replace(0)