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# Python Coding Interview Questions and Answers

### Ques 1. Write a function to reverse a string.

def reverse_string(input_str):

return input_str[::-1]

Example:

reverse_string('hello')  # Output: 'olleh'

### Ques 2. Implement a function to check if a string is a palindrome.

def is_palindrome(input_str):

return input_str == input_str[::-1]

Example:

### Ques 3. Write a Python program to find the factorial of a number.

def factorial(n):

return 1 if n == 0 else n * factorial(n-1)

Example:

factorial(5)  # Output: 120

### Ques 4. Implement a function to check if a number is prime.

def is_prime(num):

if num < 2:

return False

for i in range(2, int(num**0.5) + 1):

if num % i == 0:

return False

return True

Example:

is_prime(11)  # Output: True

### Ques 5. Create a Python class for a basic stack implementation.

class Stack:

def __init__(self):

self.items = []

def push(self, item):

self.items.append(item)

def pop(self):

return self.items.pop()

def is_empty(self):

return len(self.items) == 0

Example:

stack = Stack()
stack.push(1)
stack.push(2)
print(stack.pop())  # Output: 2