Best Python Interview Questions To Prepare In 2020

Devised back in 1989, Python wasn’t one of the programming languages unto the opening of digitalization. Today, the world of Big Data and analytics has achieved immense popularity and consequently, Python has become the favored programming language amid data scientists. Scalability, more simplistic coding, and its compilation of libraries and frameworks are just some of the characteristics that make Python fitting for companies engaged in Big Data or machine learning-based enterprises. 

Are you applying for a job that requires an understanding of Python? Here are some of the significant interview questions that you may encounter in your Python-related interview. Fall into these Python interview questions and see accurately how well-versed you remain in this programming language.

Explain the Difference Between a Shallow Copy and Deep Copy?

Deepcopy produces a different object and fills it with the child objects of the original object. Accordingly, changes in the original object are not displayed in the copy.


copy.deepcopy() creates a Deep Copy.


Shallow copy constitutes a different object and fills it with the references of the child objects within the original object. Hence, changes in the original object are indicated in the copy.


copy.copy creates a Shallow Copy.


How Is Multithreading Achieved in Python?

Multithreading normally indicates that multiple threads are executed concurrently. The Python Global Interpreter Lock doesn't allow more than one thread to operate the Python interpreter at that selective point in time. So multithreading in python is accomplished through context switching. It is pretty distinct from multiprocessing which really opens up multiple processes over multiple threads.


Discuss Django Architecture.

Django is a web service used to develop your web pages. Its architecture is as shown below:

  • The template will be the front end of the web page 
  • Model is the back end where the data is stored 
  • View communicates with the model and template and maps it to the URL
  • Django serves the page to the user 


How is Memory managed in Python?

Python has a private heap space that collects every object. The Python memory manager manages different aspects of this heap, such as caching, segmentation, sharing, and allocation. The user has no authority over the heap; only the Python interpreter has an entrance.


How Do You Represent the Contents of a Text File in Reverse Fashion?

You can do it with the following steps:

  1. Open the file with the open() function 
  2. Store the data in the file to a list 
  3. Reverse the contents of the list
  4. Run a for loop to repeat through the list


Is Python Object-oriented or Functional Programming?

Python is considered a multi-paradigm language. Python follows the object-oriented paradigm. Python supports the creation of objects and their administration through particular methods. It maintains most of the characteristics of OOPS like inheritance and polymorphism. Python follows the functional programming paradigm also. Functions may be used as the first-class object. Python maintains Lambda functions that are representative of the functional paradigm 


What Are *args and *kwargs?


It is practiced in a function prototype to receive a varying number of arguments. And it's an iterable object. 

Usage - def fun(*args)



It is applied in a function prototype to receive the varying number of keyworded arguments. It's also an iterable object.

Usage - def fun(**kwargs):


Explain the statement “in Python, Functions Are First-class Objects” in detail.

It means that a function can be handled just similar to an object. You can consign them to variables, or transfer them as arguments to other functions. You can even return them from different functions.


What Is the Output Of: Print(__name__)? Justify Your Answer.

__name__ is a unique variable. It contains the name of the current module. Program execution begins from main or code with 0 indentations. Therefore, __name__ has a value __main__. If the file is imported from another module, __name__ contains the name of this module.


What Is a Numpy Array?

A numpy array is a framework of values. All the values are of the same type and are filled by a tuple of non-negative integers. The number of dimensions circumscribes the rank of the array. The appearance of an array is a tuple of integers presenting the size of the array with every dimension.


If You Cut Your Data into Train/Test Splits, Is It Probable to over Fit Your Model?

Yes, it is one of the common novice error. You don't need to re-tune a model or train new models with different parameters after observing its performance on the test set. 


Which Python Library Is Formulated on Top of Matplotlib and Pandas to Simplify Data Plotting?

Seaborn is a Python library developed on top of matplotlib and pandas to facilitate data plotting. It is a data visualization library in Python. This library implements a high-level interface for drawing analytical informative graphs.



Cracking a job interview needs careful training apart from the right blend of skills and knowledge. Several emerging job opportunities demand knowledge in Python. You need to ensure that you have a thorough knowledge of Python fundamentals and the strength to answer all the Python interview questions. You can enroll in iROHUB Infotech for Python training in Kochi to gain expertise in this language and become a possible candidate for your next job interview.


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