Python for Data Analysts
๐ Frequently Asked Pandas Interview Questions (Beginner Level)
1๏ธโฃ What is the difference between a Series and a DataFrame?
๐ก Answer:
Series โ A one-dimensional labeled array.
DataFrame โ A two-dimensional table with rows and columns.
2๏ธโฃ How do you find missing
values in a DataFrame?
๐ก Answer:
df.isnull().sum()
This returns the number of missing values in each column.
3๏ธโฃ What is the difference between loc and iloc?
๐ก Answer:
loc โ Label-based indexing.
iloc โ Integer position-based indexing.
4๏ธโฃ What is the difference between merge() and concat()?
๐ก Answer:
merge() combines DataFrames using a common key (similar to an SQL JOIN).
concat() combines DataFrames by stacking them vertically or horizontally.
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