Python Pandas Interview Questions and Answers
Ques 16. Explain the difference between Series and DataFrame in Pandas.
A Series is a one-dimensional labeled array, and a DataFrame is a two-dimensional table.
Is it helpful?
Add Comment
View Comments
Ques 17. How do you convert a Pandas DataFrame to a NumPy array?
Use the values attribute. df.values
Is it helpful?
Add Comment
View Comments
Ques 18. What is the purpose of the nunique function in Pandas?
nunique returns the number of unique elements in a Series or DataFrame.
Example:
df['column'].nunique()
Is it helpful?
Add Comment
View Comments
Ques 19. How can you reset the index of a Pandas DataFrame?
Use the reset_index function. df.reset_index()
Is it helpful?
Add Comment
View Comments
Ques 20. Explain the concept of MultiIndex in Pandas.
MultiIndex is used to represent hierarchical index levels in a DataFrame.
Is it helpful?
Add Comment
View Comments
Most helpful rated by users:
- What is Pandas in Python?
- How do you select specific columns from a DataFrame?
- How do you import the Pandas library?
- How can you apply a function to each element in a DataFrame?
- How can you rename columns in a Pandas DataFrame?