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Top 10 Python Interview Questions and Answers for 2021

You might have heard about Python. Now you want to learn this and select this in your career. This is a high-level programming language that is interpreted, which is also one of the best interpreted programming language.

For the past five years, Python is the fastest-growing programming language for various reasons. It also has versatile features and fewer code, which has raised the popularity in the market. As popularity has increased, Python skilled developers, need also has increased.

Many small start-ups are becoming a large global enterprise due to Python’s popularity. Software developers, software engineers, data scientists, and many other job titles use Python for their operations regularly. Their main work is only to solve anything in Python.

Here you will get all type of Python-related questions like Python strings, threads, loops, sockets, etc. there will not be much general question because those answers you may get in another post, so we make this article with only related to the python interview questions.

So, this page guides you on how to crack python programming interview with confidence. Reading this guide you will also know that selecting for python for your development is correct decision.

What is Python?

 This is a high-level programming language that can build an aby type of application by using the right tool or libraries. Moreover, this is acts like a support object, threads, modules, exception-handling, automatic memory management, etc. which helps to build the application to solve the real-world problem.

Benefits of using Python?

Since it is a general-purpose programming language, it is straightforward, and easy to learn. It emphasizes readability, which reduces the cost of maintenance. This language is capable of scripting, open-source support, third-party packaging, code-reuse, etc.

This is a high level of data structure combined with dynamic binding and typing. This attracts the huge community of developers to do the rapid application development and deployment.


What all are the dynamically typed language?

Before we discuss about dynamically typed language, we need to know all about typing. It refers to type-checking in any programming language. This is a very strongly typed language like Python, which also “1”+2 gives typo error, and this language does not allow “type-coercion”. It is a weakly-typed language that will give output “12”.

It has two stages, which includes Static and Dynamic. In static data has to get the check before the execution, and dynamic data, type gets checked during the execution.

Python an interpreted language it executes every statement line by line by doing the type-checking during execution. It is a Dynamically Typed Language.

What is all about interpreted language?

Since it is interpreted language it works on statement line by line. These language includes Python, R, PHP, Javascript, Ruby, etc. these all program written in interpreted language, so it runs only with source code without any intermediary compilation step.

What is the PEP 8, and why is it so important?

In the very first, you need to know PEP stand for Python Enhanced Proposal. This is the official design document that provide every piece of information to the Python community. It also describes new features to process Python. PEP 8 is very important because this document has the style guideline, which is Python Code. All Python open-source communities need to follow these guidelines strictly and sincerely.

How the memory gets manage in Python?

Memory management handle by Python Memory Manager. Manage to allocate this memory with the help of private heap space, which is dedicated to the Python. Every object regarding Python is stores, and it being private, which is inaccessible for the programmer. However, python provides an API function to work with the personal heap space. Python also has in-built garbage collection, which it can recycle as unused memory to get the proper private heap space.

What all are the Python namespaces? Why are they used?

By the name Python itself indicates that the object name is unique and it can be used without any conflict. Python implements the “namespaces as dictionaries” that correspond with a ‘object as value’. It allows multiple namespaces by using the same name, and you can map it with a separate object. Here you will get few examples of the namespaces, those are below

  • Local Namespace- The name itself you can indicate that it inside a function, and it is temporarily created when the function call, and it also gets cleared when the process gets returns.
  • Global Namespace- This name comes from the different type of imported packages, that are getting used for the current project. This gets created when the package is imported and lasts till the execution happens in the script.
  • Built-in Namespace- Here, name comes from different exceptions, and it includes a built-in function from the core of Python.

 If we talk about the lifecycle of a namespace, then it depends on the objects which are mapped. When the object gets to end, the lifecycle of the namespace automatically comes to the endpoint. However, it is not possible to access the inner namespace objects to another outer namespace.

What is the scope in Python?

For anything Python always works inside its scope. This scop is a block of code where the Python object remains the same or relevant. It is unique and identifies the objects which are inside the program. However, this namespace has the scope definer where you can use their object without any prefix. Here you will get few example where the python creates by scope and those are following below

  • Local shop- A local shop always refers to local objects which available for the current scenario.
  • Global scope- It refers to the object available through the execution of code with their inception.
  • Module-level scope- In this module-level scop global objects is accessible and it is available in the current module.
  • Outermost scope- This is one type of callable program which comes under the built-in name. This object is the scope that get searched in last and gets the name as the reference.

 What are pickling and unpickling?

Pickle is a separate module, accepted by the Python object and it converted into the string representation and it dumps into the file by following dump function. This unique process is called pickling. When this process is retrieving that time, original Python objects get store in the string representation that time, it calls unpickling.

Discuss the five benefits of using Python?

 You will get five significant benefits by using Python. Those are below

  • It comprises a huge standard library to all internet platforms such as Email, HTML, etc.
  • Python does not explicit memory management because they can interpreter itself where they allocate the memory with new variable and make them free automatically.
  • Since it uses square brackets, it has easy readability.
  • Python is very easy to learn for beginners.
  • It has built-in data that save the time and efforts of the programming to declare the variables.


This is very important programming language that is becoming very essential for companies and the developers. Here you discover these lists where you get the top Python interview questions. These may not contain the all possible scenario, but this can be your excellent starting point to do good in your interview.

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