In Python Pandas, while performing mathematical operations on series, index matching is implemented and all missing values are filled in with …………… by default.

1. Null
2. Blank
3. NaN
4. Zero

Given a Pandas series called Sequences, the command which will display the first 4 rows is …………… .

1. print(Sequences.head(4))
2. print(Sequences.Head(4))
3. print(Sequences.heads(4)
4. print(Sequences.Heads(4))

Which of the following is a two-dimensional labelled data structure of Python ?

1. Relation
2. DataFrame
3. Series
4. Square

When we create a DataFrame from a list of Dictionaries the columns labels are formed by the :

1. Union of the keys of the dictionaries
2. Intersection of the keys of the dictionaries
3. Union of the values of the dictionaries
4. Intersection of the values of the dictionaries