Common Python Coding Problems — Part 1

In this article, we will solve some common coding problems in Python. You can use this list to practice interview questions.

FizzBuzz Problem — Python

def fizzbuzz(n):
    for i in range(1, n + 1):
        if i % 3 == 0 and i % 5 == 0:
            print("FizzBuzz")
        elif i % 3 == 0:
            print("Fizz")
        elif i % 5 == 0:
            print("Buzz")
        else:
            print(i)

# Example usage
fizzbuzz(100)

Two Sum Problem — Python

def two_sum(nums, target):
    num_to_index = {}
    
    for index, num in enumerate(nums):
        complement = target - num
        if complement in num_to_index:
            return [num_to_index[complement], index]
        num_to_index[num] = index
    
    return None  # Return None if no solution is found

# Example usage
input_list = [2, 7, 11, 15]
target_sum = 9
result = two_sum(input_list, target_sum)
print(result)  # Output: [0, 1]

Palindrome Checker — Python

def is_palindrome(value):
    # Convert the input to string to handle both strings and numbers
    str_value = str(value)
    
    # Check if the string is equal to its reverse
    return str_value == str_value[::-1]

# Example usage
print(is_palindrome("madam"))  # Output: True
print(is_palindrome(121))       # Output: True
print(is_palindrome("hello"))   # Output: False
print(is_palindrome(12321))     # Output: True

Anagram Checker — Python

def are_anagrams(str1, str2):
    # Remove spaces and convert to lowercase
    str1 = str1.replace(" ", "").lower()
    str2 = str2.replace(" ", "").lower()
    
    # Sort the characters of both strings and compare
    return sorted(str1) == sorted(str2)

# Example usage
string1 = "listen"
string2 = "silent"
result = are_anagrams(string1, string2)
print(f"Are '{string1}' and '{string2}' anagrams? {result}")

Reverse a String — Python

# Original string
original_string = "Hello, World!"

# Reversed string using slicing
reversed_string = original_string[::-1]

print(reversed_string)

Find Missing Elements in Array — Python

arr = [1, 2, 3, 4, 5, 7, 6, 10]
full_range = set(range(min(arr), max(arr) + 1))
missing = list(full_range - set(arr))
missing.sort() 
print(missing)

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