Python programming language was developed and introduced by Guido van Rossum on 20 February 1991. It is one of the most used languages because of its applications in modern technologies like Data Science, Machine Learning, and Artificial Intelligence (AI).
It is a free-to-use and open-source language with an easy syntax. Also, Python is a general-purpose language based on the concept of object-oriented programming (OOP).
Python is a dynamic type of language with the feature of portability that has extensive support for libraries.
Python is considered the best option for developing games and programs efficiently. With support for multiple programs, Python is the preferred choice for all future technologies such as AI, ML, and data science.
It also has broad community support and has way better code readability. The Python developer interview questions mentioned in this comprehensive write-up will challenge your knowledge and improve your arsenal, which will land you in a great pool of opportunities.
Python has a very good future scope in various sectors:
Below are some of the top Python interview questions for freshers (with proper answers).
Python is a general-purpose computer programming language based on object-oriented programming. The programs in Python can run equally on every operating system. It is the primary language used in modern technologies like AI, data science, and ML.
It was developed in 1991.
Here is the list of some areas where Python programming language is used:
Most of the big names in the industry are using Python language for their operations. Brands like IBM, NASA, Pixer, Facebook, Spotify, Intel, YouTube, Instagram, Pinterest, Reddit, etc., use Python as one of the primary languages.
Python has various benefits, and some of them are:
Before writing a program in Python, there should be an interpreter like PyCharm installed on the system.
You can run a Python code from the run option in the menu in an interpreter. A Python code can also run in command prompt code. It will run the program after entering the correct path of the file.
A function in Python is a code block that runs when it is called in a program. Data can be passed into the function with the help of this, and it is known as a parameter. The function can also return data as results.
There are basically three types of functions in Python:
These functions come defined with the Python language. Here are some of the built-in functions in Python:
These functions are defined by the user to perform a task in the program. These are defined with the def keyword at the start. These functions are written like this:
These are the functions that are defined without a name. Also called lambda functions, the anonymous functions are used when a user needs a function for a little time in function. It is written as— lambda()
A function in Python is called with the help of the def keyword. A function block starts with this keyword, and then function name and parentheses(()) take place. Arguments are placed between this, and parameters can also be defined inside of this.
Python code is interpreted. A Python code is converted into bytecode that is executed by a virtual machine in Python. A Python program is not needed to build like code for other languages where it is compiled, and it works on an interpreter only.
The exact same variable can be used multiple times in a program in a dynamically typed language like Python.
The raw data that is assigned to constants and variables are defined as literals in Python. Basically, these are used to represent a fixed value in the source code. It can be either a string type, a numeric type, a boolean type, etc.
When the implementation of the programs is done directly without compilation of the program into machine language, the language is called interpreted language. These languages are slower than the compiled languages.
The isolated environment for development and debugging Python is called virtualenv. It runs multiple applications with the help of pip. You can also use it to isolate a Python interpreter with settings and libraries.
virtualenv is a tool that is used for storing copies of Python and pip that are installed from the projects. With the help of this, a user can work on multiple projects on the same machine at the exact same time.
Most future technologies are mostly dependent on Python, and that is what makes it one of the most used languages.
Python is very popular, and it is used as it is less complex than other languages. The future is of Artificial Intelligence (AI) and Machine Learning (ML). Because the majority of programming in ML and AI is done with Python, the future of the language contains more opportunities.
The function that is used to reverse a list in Python is list.reserve()
The Python map() function processes and transforms the iterable like tuples and lists without using for loop.
It is a block that is preceded with the help of the try keyword.
Using the ‘with’ command is the shortest way to open a text file and display the content in it.
Yes, I can do it with the help of a bitwise operator.
The indexing starts from zero, and the element at the second index is 4. The output will be 4.
A dictionary in Python is a collection of items that are written in curly brackets with keys and values. The items are in no particular order and are used to retrieve the value for keys that are known.
If there are two methods with the exact same name to perform different tasks and provide different functionality, the concept of overriding is used.
The new modifiers hide the original method, which provides different functionality. The original method can also be accessed by the base class.
Pass is a statement in Python that is used as a placeholder for upcoming codes. At execution, it does not show any error, but it is not allowed in loops, class definitions, if statements, or function definitions.
Basically, it is a null statement, and when it is executed, it will result in no operation.
When the functions call themselves in a program, the process is known as recursion. It has two parts, the base case and the recursive case.
The base case is used to stop the recursion, and the recursive base is where the function calls itself.
The basic applications of Python include:
When a nested function defines a value in an enclosing scope, the closure occurs in the program. It remembers the values.
All the numerical code is stored in SciPy. It contains a better version of the linear algebra modules with more features. There are more algebra modules in SciPy as well.
Enumerate() is a function that is used to iterate through a sequence. It keeps track of both elements and the index. It takes the collection and returns it as an enumerated object.
Python does not perform compile-time code checking except when the code is syntactically invalid. If the code is following the syntax rules, it will compile without even checking it.
Python run time code checking is done dynamically. All the parts of the program are checked at runtime.
.py files have the source code of a program, while the .pyc files have the bytecode of a Python program. Python compiles the .py files and saves them as .pyc files.
Comments are text with the information in Python. These are used when two or more programmers are working on a project. The use of Python comments is to analyze, debug, and provide feedback.
Comments are of two types:
Duplicate elements can be removed from the list by turning them into the set. The set (list) function is used for it.
Tkinter in Python is a library and toolkit for GUI development. It has attributes like dimensions, fonts, colors, etc. It also gives support for various GUI applications.
A Python pyramid is made for larger applications. We can select a database, URL structure, templating style, database, etc., with the help of a pyramid. It provides flexibility as it is a heavy configuration program.
No, it is not possible because it will end up in a generator instead of a tuple comprehension.
It is used to comment out everything that comes after on the line in Python.
Identifiers can be of any length. There are no limitations on length in Python.
A package holds sub-packages and modules, and the file __init__.py is used in the package for holding user-interpreted codes.
A module is a file that has Python code. It also modifies the code to get executed in run time. It consists of the unit namespace, which also has extracted variables.
The modules prevent collision between global variable names, and packages do the same between module names. The packages are also reusable, and that is why they are preferred.
In Python, the location where we can find a variable and can access it when it is required is called scope. This is of two types: global and local.
Global variables are the ones that can be used by any part of the program and can be declared outside of any function.