Python Viva Questions & Answers (Top 50 with Detailed Answers)
This post contains important Python viva questions with detailed explanations. It is useful for exams, interviews, and concept building.
1) What is Python?
Python is a high-level, interpreted programming language that is known for its simple and readable syntax. It allows developers to write fewer lines of code compared to other languages. Python is widely used in web development, data science, machine learning, and automation.
2) Who developed Python?
Python was developed by Guido van Rossum in 1991. His main objective was to create a language that is easy to understand and reduces the complexity of coding. Today, Python is maintained by a large global community.
3) Why is Python popular?
Python is popular because it is easy to learn, has a simple syntax, and supports multiple programming paradigms. It has a large number of libraries and frameworks which make development faster and easier in various domains.
4) What is an interpreted language?
An interpreted language executes code line by line instead of compiling it at once. This allows programmers to test and debug code easily. Python uses an interpreter which makes development faster and flexible.
5) What is a variable?
A variable is a container used to store data values in memory. It allows programs to store and manipulate data easily. Variables can store different types of values such as numbers, text, or lists.
6) What are data types in Python?
Python supports multiple data types like int, float, string, list, tuple, set, and dictionary. Each data type is used for a specific purpose and helps in organizing and processing data efficiently.
7) What is a list?
A list is a collection of items that can store multiple values in a single variable. It is mutable, meaning elements can be changed, added, or removed. Lists are very useful for storing dynamic data.
8) What is a tuple?
A tuple is similar to a list but it is immutable. This means once a tuple is created, its elements cannot be modified. Tuples are used when data should remain constant.
9) Difference between list and tuple?
The main difference is that lists are mutable while tuples are immutable. Lists use square brackets [] and tuples use parentheses (). Tuples are generally faster and safer for fixed data.
10) What is a string?
A string is a sequence of characters enclosed within quotes. It is used to represent text in Python programs. Strings support many operations such as slicing, concatenation, and formatting.
11) What is a loop?
A loop is used to execute a block of code repeatedly until a certain condition is met. It helps in reducing repetitive code and improves program efficiency.
12) Types of loops?
Python mainly supports two types of loops: for loop and while loop. The for loop is used for iteration over sequences, while the while loop runs as long as a condition is true.
13) What is a function?
A function is a reusable block of code that performs a specific task. It helps in organizing code and avoiding repetition. Functions improve readability and maintainability of programs.
14) What is a parameter?
A parameter is a value passed to a function when it is called. It allows functions to perform operations on different inputs and produce different results.
15) What is a return statement?
A return statement is used to send a value back from a function to the caller. It allows functions to produce output and use it in other parts of the program.
16) What is a class?
A class is a blueprint used to create objects. It defines properties (variables) and methods (functions) that an object can have.
17) What is an object?
An object is an instance of a class. It contains actual values and can perform actions using methods defined in the class.
18) What is OOP?
OOP stands for Object-Oriented Programming. It is a programming paradigm based on classes and objects, which helps in organizing code in a structured way.
19) What is inheritance?
Inheritance allows one class to use the properties and methods of another class. It helps in code reuse and reduces redundancy.
20) What is polymorphism?
Polymorphism means one function can perform different tasks depending on the input. It improves flexibility and code reusability.
21) What is encapsulation?
Encapsulation is the process of hiding internal details of a class and allowing access only through methods. It improves security and data control.
22) What is indentation?
Indentation is used to define blocks of code in Python. Unlike other languages, Python relies on indentation instead of brackets, making it very important.
23) What is a comment?
A comment is a line in the code that is ignored during execution. It is used to explain code and improve readability.
24) What are operators?
Operators are symbols used to perform operations on variables such as addition, subtraction, multiplication, and comparison.
25) What is a conditional statement?
Conditional statements are used to make decisions in a program. They execute different blocks of code based on conditions using if, else, and elif.
