Python Interview Questions and Answers

Last updated on Feb 06, 2023
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Python Interview Questions

A high-level, interactive, and object-oriented scripting language, Python is a highly readable language that makes it ideal for beginner-level programmers.  Here we can help you to prepare for the best Python interview questions. It uses English keywords and has fewer syntactical constructions as compared to other languages. Similar to PERL and PHP, Python is processed by the interpreter at runtime. Python supports the Object-Oriented style of programming, which encapsulates code within objects.

Python can be used for developing Websites, Web Apps, and Desktop GUI Applications. Here is a list of the most frequently asked Python Programming Interview Questions to learn more.

Quick Questions about Python
What is the latest version of Python? 3.8.3 and released on May 13, 2020.
Who has invented Python? Guido van Rossum
What language does Python use? C languages
License Python releases have also been GPL-compatible.

Did you know, Python is also referred to as a “batteries included” language due to its in-depth and comprehensive standard library. Our Questions on Python have been selected from a plethora of queries to help you gain valuable insights and boost your career as a Python Developer.

Most Frequently Asked Python coding interview questions

Here in this article, we will be listing frequently asked Python Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q11. What is pickling and unpickling?

Pickling in Python basically refers to the method of serializing the objects within multiple binary streams. It is used to save the state of the objects and then reuse them at another time without losing instance-specific data.

Unpickling is simply the opposite of pickling

Note: Our questions on Python has been created by seasoned Python experts. It shall help you to answer some of the most frequently asked questions during a job interview.

Q12. How we can copy an object in Python?
In Python, we can use try copy.copy () or copy.deepcopy() for copy an object.
Q13. How can you access a session in Flask?

A session allows the programmer to remember information from one request to another. In a flask, a session uses a signed cookie so that the user can look at the contents and modify them. The programmer will be able to modify the session only if it has the secret key Flask.secret_key.

Q14. What is lambda? Why do lambda forms not have statements?

Lambda is an anonymous expression function that is often used as an inline function. Its form does not have a statement as it is only used to make new functional objects and then return them at the runtime.

Q15. How to create an empty class in Python?

In Python, an empty class can be created by using the “pass” command. This can be done only after the defining of the class object because at least one line of code is mandatory for creating a class. Here’s an example of how to create an empty class:


class customer:

customer1 = customer()

customer1.first_name = 'Jason'
customer1.last_name = 'Doe'

Q16. What is the use of Xrange in Python?

In Python, the use of the xrange() function is to generate a sequence of numbers that are similar to the range() function. But, the xrange() function is used only in Python 2. xx whereas the range() is used in Python 3.

Q17. What is the use of __ init __ in Python?

The "init" is an example of a reserved method in python classes. It is actually known as a constructor in the object-oriented concepts and techniques. It is called when an object is created within a class, and then it allows the same class to initialize the attributes within.

Q18. What is a slice object in Python?

The Slicing() object in Python allows users to access parts and sequences of data types such as strings, tuples, and lists. Slicing can also be used to modify or even delete items that have mutable sequences such as lists. Besides that, slices can also be integrated with third-party apps like NumPy arrays, data frames, and Panda series.

Syntax: slice(start, stop, step)

Q19. How is memory managed in Python?

Memory is managed by the private heap space. All objects and data structures are located in a private heap, and the programmer has no access to it. Only the interpreter has access. Python memory manager allocates heap space for objects. The programmer is given access to some tools for coding by the core API. The inbuilt garbage collector recycles the unused memory and frees up the memory to make it available for the heap space.

Note: This is a type of most frequently asked python developer interview questions.

Q20. What is a negative index in Python?

In Python, the negative index is used to index by starting from the last element in a list, tuple, or any other container class which supports indexing. Here, (-1) points to the previous index, -2 to the second last index and similarly.

Key Points of Python
  • Similar to PERL and PHP, Python is processed by the interpreter at runtime. Python supports the Object-Oriented style of programming, which encapsulates code within objects.
  • Derived from other languages, such as ABC, C, C++, Modula-3, SmallTalk, Algol-68, Unix shell, and other scripting languages.
  • Python is copyrighted, and its source code is available under the GNU General Public License (GPL).
  • Supports the development of many applications, from text processing to games.
  • Works for scripting, embedded code, and compiled the code.
  • Detailed
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