Python Interview Questions and Answers: The Ultimate Guide


Python is definitely a great language to work with, and the demand for Python developers is growing every year. There are many things you can build with Python, from website crawling bots to calculating mathematical problems.

As a professional Python developer, you can make a pretty good salary. In this article, you’ll find dead-simple answers to Python questions covering different aspects of this amazing programming language.

Top Python Interview Questions

Basic Python Interview Questions

Q: What is Python?

A: Python is a high-level, object-oriented programming language designed with code readability in mind. You can use it to write applications, websites, games, and software.

Q: What are the Advantages of Using Python?

A: Python emphasizes code readability and has a minimalistic syntax, which makes it easy to understand. Because of its object-oriented nature, you can build libraries and functions quickly with it.

When it comes to operating from a development perspective, Python is among the best software languages. (Programs written in) It can perform certain tasks faster than programs written in other languages.

Q: What are Local Variables and Global Variables in Python?

A: Local variables have a short scope, which means they are defined only inside the context of their lexical scope. Global variables, on the other hand, are global in scope. These are variables that are defined globally. They can be used anywhere in the code.

Q: What are the Key Features of Python?

A: Python is an interactive, object-oriented, interpreted, and high-level programming language. It is also a dynamic language since it facilitates the creation of flexible code and also imposes fewer restrictions on how a feature can be implemented. It also provides elegant features for structured programming and comes with a large standard library.

Q: Why Consider Python Over Other Popular Programming Languages?

A: Following are the best reasons why Python is considered superior to other popular programming languages:

  • It is a simple yet powerful programming language that allows you to represent complex algorithms with a high level of abstraction.
  • Python is compatible with various platforms like Windows, Mac, Linux, and Raspberry Pi.
  • Python has a simple, pseudo-English syntax.
  • It permits developers to compose programs with fewer lines than other programming languages.
  • Python runs on an interpreter system, which implies that the code can be executed as soon as it is composed. It assists with giving output rapidly.

Intermediate-Level Python Interview Questions

Q: What is self in Python?

A: Self is a keyword in Python, and it refers to the instance in which a method has been invoked. You can use this binding to pass arguments to methods, override attribute values, or create new instance attributes.

Q: What are Python iterators?

A: An iterator is an object that is used to iterate over iterable objects like list, tuple, dict, and set. It has a method that returns the next value from iteration.

Q: What are the Generators in Python?

A: Generators are a function that returns an iterator in Python. It can be used inside a loop. They are used to return the values on demand and they are helpful when dealing with large data sets.

Q: What is the Difference Between a List and a Tuple?

A: A list is an ordered collection of items where each item can be accessed by its index. While a tuple is also an ordered collection of items, however, it can’t be indexed. 

A list can be a data structure with no fixed length, whereas a tuple is a fixed number of elements. The reason for the difference is that tuples are essentially immutable and lists can vary in length.

Q: What is Polymorphism in Python?

A: In object-oriented programming, polymorphism is a very important concept that allows different types of objects to interact with each other in a meaningful way. It is a form of abstraction and encapsulation, which implements code reuse.

Q: What are Python Decorators?

A: Python decorators are a powerful and expressive syntax for manipulating functions, methods, and classes. They are used primarily to manage function/method/class. Python decorators are functions that commonly modify and return a function definition. They are used to modify function behavior.

Advanced-Level Python Interview Questions

Q: How is Multithreading Achieved in Python?

A: Multithreading is the process of performing multiple tasks simultaneously. This is achieved by dividing programs into several threads. Python provides the ability to have multiple threads in a single program.

Q: Explain Inheritance and Its Types in Python?

A: Inheritance provides a convenient and efficient mechanism for code reuse. By building upon existing classes, an application can inherit the attributes and methods of those classes, resulting in considerable time savings when creating new applications.

Inheritance is the concept that allows us to create a new object from an existing object. The new object is called a Child Object whereas the existing object is called the Parent Object. There are 4 types of inheritance supported by Python:

1. Single Inheritance

Single inheritance is a mechanism for code reuse in object-oriented programming, whereby an object or “child” class can inherit and override properties and methods of its parent “parent”, or “base” class. This is used to reduce code duplication.

2. Multi-Level Inheritance

Multilevel inheritance is a feature of object-oriented programming, wherein a child class can inherit attributes and methods from multiple parent classes. This allows us to reuse the code without creating unnecessary redundancy.

3. Hierarchical Inheritance

Hierarchical inheritance is a form of inheritance that enables classes to be defined in such a way that they can either extend or override methods and properties of classes above them in the hierarchy.

4. Multiple Inheritance

Multiple inheritance is a language feature in Python that allows a class to be derived from multiple base classes. A derived class is acquired from several superclasses.

Q: What is the Difference Between run time and compile time?

A: Run time is the time during which the program is executed, and compile time is when you do build-time stuff like compilation, linking, and optimization.

Q: What are the Applications of Python?

A: Python is a versatile programming language that has applications in web development, gaming, and movies, scientific and financial computing, (developing) machine learning (libraries) and artificial intelligence, e-commerce, robotics, systems automation, networking, and web services. It is used in a variety of industries, and multiple companies have developed applications with the Python programming language.


We have come to the end of the list of top python interview questions. We hope you find this guide useful to better understand Python and to prepare and crack your Python-based interview. Wish you luck!

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