What kind of programming language is Python, and what is it known for?

🔹 Basic Python Questions

1. What is Python?

   • Python is a high-level, interpreted, general-purpose programming language known for its readability and simplicity.

2. What are Python’s key features?

   • Easy syntax, interpreted, dynamically typed, object-oriented, extensive libraries, cross-platform.

3. What are Python's data types?

   • int, float, str, bool, list, tuple, set, dict, NoneType.

4. How do you write a comment in Python?

   python

   # This is a comment

5. What is a variable?

   • A variable is a named location used to store data in memory.

🔹 Control Flow Questions

6. What are conditional statements in Python?

   python

   if condition:

   # code

   elif another_condition:

   # code

   else:

   # code

7. What are loops in Python?

   • for loop:

     python

     for i in range(5):

     print(i)

   • while loop:

     python

     while condition:

     print("Looping")

8. How do you break out of a loop?

   • Use break to exit, continue to skip an iteration.

🔹 Functions & Scope

9. How do you define a function in Python?

   python

   def greet(name):

   return "Hello " + name

10. What is the difference between global and local variables?

• Local variables exist inside functions.

• Global variables are declared outside and accessible inside functions using global keyword.

🔹 Data Structures

11. How do you create a list?

python

my_list = [1, 2, 3]

12. Difference between list and tuple?

• List is mutable: []

• Tuple is immutable: ()

13. How to create a dictionary?

python

my_dict = {"name": "Alice", "age": 25}

14. What is a set?

• An unordered collection of unique items.

python

my_set = {1, 2, 3}

🔹 Object-Oriented Programming

15. How do you define a class in Python?

python

class Person:

def__init__(self, name):

self.name = name

def greet(self):

return "Hello " + self.name

16. What are init and self?

• init is the constructor.

• self refers to the current instance of the class.

🔹 File Handling

17. How to read a file in Python?

python

with open("file.txt", "r") as f:

content = f.read()

18. How to write to a file?

python

with open("file.txt", "w") as f:

f.write("Hello World")

🔹 Exception Handling

19. How do you handle exceptions?

python

try:

x = 10 / 0

except ZeroDivisionError:

print("Cannot divide by zero")

finally: print("Always runs")

🔹 Miscellaneous Questions

20. What is a lambda function?

python

add = lambda x, y: x + y

print(add(2, 3)) # 5

21. What is list comprehension?

python

squares = [x*x for x in range(5)]

22. How do you install a package in Python?

bash

pip install package_name

23. What is a module and a package?

• Module: A Python file with functions/classes.

• Package: A collection of modules in a directory with init.py.

24. What is the difference between is and ==?

• is checks identity.

• == checks equality of values.