More Problems

• Write a program to check if a number is a composite number.
• Write a program to find the longest word in a text file.
• Write a program to implement a basic recipe management system.
• Write a program to find the total number of unique characters in a string.
• Write a program to implement a basic online quiz application with time limits.
• Write a program to check if a string is a valid base64 encoded string using regex.
• Write a program to find the maximum product of any two numbers in an array.
• Write a program to implement a simple file encryption and decryption system.