Python Interview Questions with Answers

 1. Write a Python program to find the sum of all even numbers in a given list.

Program:

def sum_even_numbers(lst):

    return sum(num for num in lst if num % 2 == 0)

# Test the function

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

result = sum_even_numbers(numbers)

print(result)

2. Write a Python function to check if a given number is prime.

Program:

def is_prime(num):

    if num <= 1:

        return False

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

        if num % i == 0:

            return False

    return True

# Test the function

number = int(input("Enter a number: "))

if is_prime(number):

    print(number, "is a prime number.")

else:

    print(number, "is not a prime number.")

3. Write a Python program that finds and prints the largest and smallest elements in a given list.

Program:

def find_min_max(lst):

    min_num = min(lst)

    max_num = max(lst)

    return min_num, max_num

# Test the function

numbers = [10, 5, 7, 12, 3, 9, 15]

min_value, max_value = find_min_max(numbers)

print("Minimum value:", min_value)

print("Maximum value:", max_value)

4. Write a Python program to count the number of vowels in a given string.

Program:

def count_vowels(text):

    vowels = 'aeiouAEIOU'

    count = 0

    for char in text:

        if char in vowels:

            count += 1

    return count

# Test the function

input_string = input("Enter a string: ")

num_vowels = count_vowels(input_string)

print("Number of vowels:", num_vowels)

5. Write a Python program to reverse a given string.

Program:

def reverse_string(text):

    return text[::-1]

# Test the function

input_string = input("Enter a string: ")

reversed_string = reverse_string(input_string)

print("Reversed string:", reversed_string)

6. Write a Python program to find the second largest number in a given list.

Program:

def find_second_largest(lst):

    lst.sort()

    return lst[-2]

# Test the function

numbers = [10, 5, 7, 12, 3, 9, 15]

second_largest = find_second_largest(numbers)

print("Second largest number:", second_largest)

7. Write a Python program that checks if two strings are anagrams (contain the same characters in a different order).

Program:

def are_anagrams(str1, str2):

    return sorted(str1.lower()) == sorted(str2.lower())

# Test the function

string1 = input("Enter the first string: ")

string2 = input("Enter the second string: ")

if are_anagrams(string1, string2):

    print("The strings are anagrams.")

else:

    print("The strings are not anagrams.")

8. Write a Python program to calculate the average of numbers in a given list.

Program:

def calculate_average(lst):

    return sum(lst) / len(lst)

# Test the function

numbers = [10, 5, 7, 12, 3, 9, 15]

average = calculate_average(numbers)

print("Average:", average)

9. Write a Python program to find the factorial of a given number using a loop.

Program:

def factorial(n):

    result = 1

    for i in range(1, n + 1):

        result *= i

    return result

# Test the function

num = int(input("Enter a number: "))

print("Factorial of", num, "is", factorial(num)) 

10: Write a Python program to check if a given string is a pangram (contains all the letters of the alphabet).

Program

import string

def is_pangram(text):

    text = text.lower()

    alphabet = set(string.ascii_lowercase)

    return set(text) >= alphabet

# Test the function

input_string = input("Enter a string: ")

if is_pangram(input_string):

    print("The string is a pangram.")

else:

    print("The string is not a pangram.")