Interview Preparation & Common Interview Questions
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Python is a high-level, interpreted, object-oriented programming language known for its simple syntax and readability. It is widely used for web development, automation, data analysis, artificial intelligence (AI), machine learning, cybersecurity, and software development because it is easy to learn, cross-platform, and has a vast collection of libraries.
Python provides several built-in data types, including:
int– Integer numbersfloat– Decimal numbersstr– Stringsbool– True/False valueslist– Ordered, mutable collectiontuple– Ordered, immutable collectionset– Unordered unique collectiondict– Key-value pairs
- List: Mutable (can be modified), uses square brackets
[]. - Tuple: Immutable (cannot be modified after creation), uses parentheses
().
==compares the values of two objects.ischecks whether two variables refer to the same object in memory.
A function is a reusable block of code that performs a specific task. Functions improve code readability, reusability, and maintenance.
Object-Oriented Programming (OOP) is a programming paradigm based on objects and classes. Its four main principles are:
- Encapsulation
- Inheritance
- Polymorphism
- Abstraction
OOP helps build modular, reusable, and scalable applications.
- break – Exits the loop immediately.
- continue – Skips the current iteration and moves to the next.
- pass – Does nothing; acts as a placeholder.
Python uses the try-except block to handle runtime errors gracefully without stopping the program.
Example:
try:
num = 10/0
except ZeroDivisionError:
print("Cannot divide by zero")