Top 200 Python Interview Questions and Answers

Concat and merge are methods in pandas used for combining dataframes.

• Concatenation is used to combine dataframes along rows or columns

• Merge is used to combine dataframes based on common columns or indices

• Concatenation example: pd.concat([df1, df2], a...read more

Yes, I have knowledge of both Java and Python.

• I have experience in developing robotics applications using Java and Python.

• I am familiar with object-oriented programming concepts in both languages.

• I have worked on projects involving robotics simulatio...read more

SQL and Python are fundamental skills for a software engineer.

• SQL is used for managing relational databases and querying data.

• Python is a popular programming language for data analysis, web development, and automation.

• Python can be used to interact w...read more

Python OOPs (Object-Oriented Programming) enables code reusability and organization through classes and objects.

• Encapsulation: Bundling data and methods in a class. Example: class Dog: def bark(self): return 'Woof!'

• Inheritance: Creating a new class f...read more

I primarily use popular libraries such as NumPy, Pandas, Matplotlib, and Scikit-learn in Python.

• NumPy for numerical computing

• Pandas for data manipulation and analysis

• Matplotlib for data visualization

• Scikit-learn for machine learning tasks

Advanced level of SQL and Python skills are essential for a Data Engineer role.

• Strong understanding of SQL queries, joins, subqueries, and optimization techniques.

• Proficiency in writing complex Python scripts for data manipulation, analysis, and auto...read more

Pandas is used for data manipulation and analysis in Python, providing tools for cleaning, transforming, and analyzing datasets.

• Pandas allows for easy data manipulation, cleaning, and transformation.

• It provides data structures like DataFrame and Seri...read more

Python is a versatile language with a wide range of applications and benefits.

• Easy to learn and use

• Large standard library

• Cross-platform compatibility

• Supports multiple programming paradigms

• Great for data analysis and scientific computing

• Used in web de...read more

C++ is a statically typed language with a focus on performance and low-level memory manipulation, while Python is dynamically typed and emphasizes readability and simplicity.

• C++ is statically typed, meaning variable types must be declared at compile ...read more

Python frameworks are pre-built libraries that provide a structure for developing web applications.

• Frameworks like Django, Flask, and Pyramid help streamline development by providing common functionalities like routing, templating, and database acces...read more

Web development using JavaScript and Python involves using both languages to create dynamic and interactive websites.

• JavaScript is used for client-side scripting to make web pages interactive.

• Python can be used for server-side scripting to handle bac...read more

Python uses automatic memory management through garbage collection.

• Python uses reference counting to keep track of memory usage and automatically deallocates memory when an object is no longer referenced.

• Python also utilizes a garbage collector to re...read more

The Python code to get the output string as 'jareen arpohc' from the input string 'neeraj chopra' is provided.

• Split the input string into individual words

• Reverse each word

• Join the reversed words with a space in between

Pandas is a Python library used for data manipulation and analysis.

• Provides data structures like DataFrame for handling tabular data

• Offers tools for reading and writing data from various file formats

• Supports data cleaning, transformation, and analysi...read more

Querying in pandas involves using functions like .loc, .iloc, and .query to filter and manipulate data.

• Use .loc to select rows and columns by labels

• Use .iloc to select rows and columns by index positions

• Use .query to filter rows based on a boolean ex...read more

Python offers simplicity, readability, and a rich ecosystem, making it a preferred choice over Java for many developers.

• Simplicity: Python's syntax is cleaner and more intuitive, allowing for faster development. For example, list comprehensions in Py...read more

Yes, I am proficient in Python and familiar with popular libraries like NumPy, Pandas, and Matplotlib.

• Proficient in Python programming language

• Familiar with popular libraries like NumPy, Pandas, and Matplotlib

• Experience in using libraries for data ma...read more

Middleware in Django Settings.py is used to modify the request/response objects, process requests before they reach the view, and responses before they are sent to the client.

• Middleware classes are defined in the MIDDLEWARE setting in settings.py

• They...read more

Python is a versatile, easy-to-read, and widely-used programming language with a large community and extensive library support.

• Simple syntax makes it easy to learn and use

• Versatile - used in web development, data analysis, artificial intelligence, et...read more

Python is easier to learn, has simpler syntax, and is more versatile than C++.

• Python has a simpler syntax and is easier to read and write than C++.

• Python is an interpreted language, which means it doesn't need to be compiled before running.

• Python has...read more

self is a reference to the instance of the class and is used to access its attributes and methods.

• self is the first parameter of any method in a class.

• It is used to refer to the instance of the class within the class itself.

• self allows the instance t...read more

Pandas provides multiple ways to reset the index of a DataFrame or Series.

• The reset_index() function resets the index to the default integer index.

• The set_index() function sets a column as the new index.

• The reindex() function can be used to change th...read more

Pandas is used in project for data manipulation and analysis in Python.

• Pandas is used for data cleaning, transformation, and analysis.

• It provides data structures like DataFrame and Series for handling data.

• Pandas can be used for tasks like filtering,...read more

The get method is a function used to retrieve the value of a specified property from an object.

• Used in JavaScript to access the value of a property in an object

• Syntax: objectName.propertyName

• Example: var person = {name: 'John', age: 30}; console.log(...read more

The most commonly used library for Python is the Python Standard Library.

• Python Standard Library is a collection of modules and packages that provide a wide range of functionality.

• Popular third-party libraries include NumPy, Pandas, Matplotlib, and r...read more

Python is widely used in IT for web development, data analysis, artificial intelligence, automation, and scripting.

• Python is used for web development frameworks like Django and Flask.

• It is used for data analysis and scientific computing with librarie...read more

loc and iloc are methods in Pandas used for selecting rows and columns by label or integer position.

• loc is used for selecting rows and columns by label

• iloc is used for selecting rows and columns by integer position

• Example: df.loc[2, 'column_name'] se...read more