Pandas Interview Questions-Know More

Pandas is a famous library of software that is created to execute the manipulation of data and analyze high-level data. At famous technical companies, the rounds of the technical interview include the questions of the Panda interview. They include basic to advanced level questions. They also include questions about the various tools of Python.Pandas is a famous library of software that helps to manipulate tabular data. The library of Pandas was invented in the year 2010. In the library of Pandas, a documented code is also available. In this article, you will get multiple interview questions about Pandas. Mastering these questions and answers will help you grab the attention of the interviewer as these interview questions and answers are a mix of both basic and technical ones that every person attending the interview is expected to know. let us know more about that the Pandas Interview Questions-Know More.

Pandas Interview Questions-Know More

Here are 17 interview questions and answers of Pandas:

Define Pandas?

Pandas is a package of python which provides fast and meaningful data structures which are designed to work with both labeled and relational data. Its main function is to analyze high-level data in Python.

Define Pandas Series?

Series in Pandas is defined as an array of one-dimensional labels which is capable of holding any type of data. For example, objects of python, float, string, integer, etc. 

Mention the two categories of Data structures in Pandas?

 In Pandas library, there are two categories of Data Structures. The two categories of Data structures are as follows:

DataFrames and Series

In Pandas, Series is defined as a one-dimensional data structure whereas DataFrame is defined as a two-dimensional data structure. The three-dimensional data structure is known as a panel.

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 What is Re-indexing in Pandas?

Re-indexing in Pandas means to comply with DataFrame in a new index. Re-indexing in Pandas switches the labels of rows and labels of columns of a DataFrame.

Mention the 4 characteristics of Pandas library

The 4 features of Pandas library are as follows:

Time Series.


Alignment of the data.

Efficient memory.

Merge and join.

What is the use of Pandas?

Pandas is used for:

Manipulation of the data.

Data analysis.

Data structures.

How are copies of the series created in Pandas?

 In Pandas the copies of the series are created by typing:

Series. Copy(deep=True)

If you type Series. Copy(deep=false), then no series will be copied.

Define Time Series in Pandas.

 A time series is arranged in a data sequence which shows how a quantity changes. Pandas contain excellent characteristics for working with time series.

How will the series be created from the dictionary in Python?

 A series is a one-dimensional data structure that consists of objects of python, strings, integers, etc. To create a series from the dictionary in python use the method of Series () without the index parameter.

How will you create DataFrame in different ways in Pandas?

 In Pandas, DataFrame is defined as a two-dimensional labeled structure of data. There are various ways to create a DataFrame in Pandas. For example:

imports pandas library

import pandas as pd

# initialize list of lists

Data= [[‘tom’, 10], [‘nick’, 15], [‘Juli, 14]]

#Create the pandas DataFrame

df= pd. DataFrame (data, columns= [‘Name’, ‘Age’])

# print dataFrame


The output is as follows:

Name  Age 

  1.  Tom    10
  2. Nick     15
  3. Juli        14

How an empty DataFrame is created in Pandas?

In Pandas, to create an empty DataFrame use:

Import pandas as PD

MyEmpty= PD.DataFrame()

How will you rename the Index or Columns of a DataFrame in Pandas?

The function used to rename the Index or Columns of a DataFrame in Pandas is:


How will you change a NumPy array to a DataFrame?

 The example to change a NumPy array to a DataFrame is as follows:

Imports pandas as PD

Import NumPy as np

P= PD.Series(np. random.randint (1, 7, 35))

# Input

P= pd.Series(np.random.randint (1, 7, 35))

Info= pd.DataFrame (p.values.reshape(7,5))


The output is as follows:

0  1  2  3  4

0   3  2  5  5  1

1  3  2  5  5  5

2  1  3  1  2  6

3  1  1  1  2  2

4  3  5  3  3  3

5  2  5  3  4  4

6  3  6  6  5  5

How will you change a series to DataFrame?

To change a series to DataFrame use:

Series.to_frame (name=None)

Here, the name refers to the object. The value of default is none. If the default has one value then the name will be used instead of the series. For example:

S= PD.Series([“a”, “b”, “c”, ],

name= “vals”)


The output is as follows:


  1. a
  1. b
  1. c

Define Pandas NumPy array

 NumPy stands for Numerical Python. NumPy is defined as an array of python which is used for the process of the multidimensional and single–dimensional array. It is also used for calculations. 

The calculations which are done by the NumPy array are faster.

How will you change a DataFrame to a NumPy array?

 To do mathematical functions which are of high level, it is compulsory to convert DataFrame to NumPy arrays. To change the DataFrame to a NumPy array using:, copy=False)

How will you convert DataFrame to an excel file?

To convert a DataFrame to an excel file use:


Mention the different ways to sort the DataFrame

The different ways to sort the DataFrame are as follows:

  1. By using a label.
  2. By using actual value.


In this article, you will get the maximum information about what are the questions asked by the interviewer of Pandas. 

You will get to know what is the meaning of Pandas, the different characteristics of Pandas, and what are the uses of Pandas. Preparing along these lines can help you in obtaining a good position in the interview rounds.All the best!


1.Mention the three data structures in Pandas DataFrame.

 The three data structures in Pandas DataFrame are: rows, columns, and the data.

2.What amount of data can Pandas handle?

The amount of data Pandas handle is 100 Gb.

3.Are pandas written in C?

 No, Pandas are not written in C.

Pandas Interview Questions-Know More

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