The tech industry is growing like never before. Every now and then, we see new software articles appear in the market. So, no matter whether you’re a abecedarian or an accomplished Python developer, there are always opportunities cat-and-mouse for you.

The only claim is that you have to argue the employer to use your skills and proving yourself during aPython programming interview.

However, you’ll need to adapt yourself. Otherwise, addition else might get the job. You can either try Python programming challenges or simply revise the frequently asked Python account questions and answers.

Today, I’m gonna share my claimed acquaintance of Python interviews with you. I’ll list the questions they asked me including their accessible solutions. So it’ll be an ultimate guide for you to get hired as a Python Programmer.

1 – Let’s accept we have the acclaimed “Iris” data set. Now retrieve only those annal where “Sepal.Length” is greater than six and “Sepal. Width” is greater than 3.3

Iris Data Set Details:

Official Website

Download in CSV format





2 – Let’s say we have two arrays, as mentioned below. How can we add agnate items of both arrays?


3 – What is *args and **kwargs? Give an archetype for each.

Both of these are used to pass a capricious number of arguments in a function. We use *args for non-keyword arguments admitting **kwargs is used for keyword-based arguments, for example, key-value pair).


4 – How do you check all the functions and backdrop accessible in a module?

We can pass the module name inside the dir() action to retrieve its functions and properties’ names.

For example:

Let’s say we have a module called with a capricious and two user-defined functions.


Here you can see the dir() action also gets all the congenital backdrop and methods.

5 – What are ‘literals’ in Python?

In Python, accurate is the data/value assigned to a capricious or constant. For example, Python has four altered types of literals:

  • Numeric Literals
  • String Literals
  • Boolean Literals
  • Special Literals

6 – How do you concatenate two tuples?

The chain of tuples refers to the action through which we can join two or more tuples. For example, let’s accept we have two tuples:


Now, we can concatenate them calm by using a plus symbol. Basically, this account will add the elements of tuple_2 at the end of tuple_1.


Like this:


7 – What is lambda in Python?

Lambda is a small action in Python that can only action one expression. But, we can add as many ambit as needed.

Generally, it’s more acceptable to use the lambda action inside of addition function. Let’s use the lambda action to accumulate 14 with a number passed through an argument:


8 – What is slicing?

Slicing is a action to retrieve parts of a string, array, list, or tuple. Basically, we pass a start and end index to specify the position of data we’re absorbed in. It’s important to note the value at the start index is included in the result admitting the value at the end index is excluded.

We can even pass a step value to skip some data. For example, retrieve every other item from an array.

In the below code snippet, the slicing is performed using square brackets []. We passed three arguments and afar them with a colon : symbol. The first constant specifies the start position of slicing, the second altercation is used to mark the end, admitting the last constant is used to define the step.


All of the three ambit of slicing are optional. If we don’t specify the start then Python will assume 0 index as the starting position. Similarly, when we skip the second constant then the length of array/string/tuple/list will be used. Whereas, by absence Python accede 1 as a step.

9 – What are Python decorators?

Python decorator is a affection that is used to enhance the functionality of an absolute action or a class. It is adopted when a developer wants to dynamically update the alive of a action after absolutely modifying it.

Let’s say we have a action that prints the name of the website developer. But, now the claim is to affectation a acceptable bulletin to the user and then show the developer name.

We can add this functionality with the help of a decorator function.


Here, you can see that welcome_user() is a decorator admitting dev_name() is the main action that we adapted dynamically.



10 – Which algorithm is used by sort() and sorted() functions?

sort() and sorted() functions apparatus the Timsort algorithm. It is because this allocation algorithm is very stable and efficient. The value of Big O in its worst case is O(N log N).

11 – How do you debug a Python program?

By default, Python comes with a congenital debugger known as pdb .

We can start the debugging of any Python file by active a command commodity like mentioned below.


12 – What is alkali and unpickling?

In Python, there is a very accustomed library called pickle . It is used for object serialization. Meaning that it takes a Python object as input and converts it into a byte stream. This whole action of transforming a Python object is known as pickling.

On the other hand, unpickling is its opposite. Here, a byte stream is accustomed as input and adapted into an object hierarchy.

13 – What is list comprehension? And accommodate an example

List Apperception is a quick way to create a Python list. Instead of manually entering a value for each index, we can simply fill the list by bombastic through our data.

Let’s accept I want to create a list whose each index will accommodate a letter from my name in consecutive order.


14 – (i for i in (54, 6, 71)) Is it a tuple comprehension?

No. In Python, there is no such abstraction of tuple comprehension.

15 – What is monkey patching in Python?

The action to dynamically change a class or module at run-time is known as Monkey Patching.


Did you spot that I absolutely called func() method but the output I accustomed was from welcome()?

16 – Predict the output of the below code? And then explain your answer



The major ambagious point in this code occurs in the last print() statement.

Before printing, we just adapted the value of x in the Parent class. It automatically updates the value of Child_2.x but not the Child_1.x. It is because we have already set the value of Child_1.x.

In other words, Python tries to use the properties/methods of child class first. It only searches the parent class if the property/method is not found in the child class.

17 – How do you affectation ancestors of a given node in Binary Tree?

Let’s accept we have this binary tree. Now, retrieve the ancestors of 65 and affectation them using Python code.



Practicing for an account is super important to land your dream job. In this article, we’ve covered some accustomed account questions but there’s much more you should know. There are entire sites which can adapt you for your next interview, it’s a huge subject, so keep learning.

This article was originally appear on Live Code Stream by Juan Cruz Martinez (twitter: @bajcmartinez), architect and administrator of Live Code Stream, entrepreneur, developer, author, speaker, and doer of things.

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