Question 3.4: Write a Python function named "validate_password" that takes a string as input and checks if it is a valid password. A valid password should meet the following criteria: • It must be at least 8 characters long. • It must contain at least one uppercase letter, one lowercase letter, and one digit

Sure, here's a Python function named "validate_password" that checks if a given string is a valid password based on the criteria you mentioned:

def validate_password(password):
    if len(password) < 8:
        return False
    if not any(char.isupper() for char in password):
        return False
    if not any(char.islower() for char in password):
        return False
    if not any(char.isdigit() for char in password):
        return False
    return True

This function first checks if the length of the password is at least 8 characters. Then it checks if the password contains at least one uppercase letter, one lowercase letter, and one digit using the `any` function and the `isupper`, `islower`, and `isdigit` methods of strings. If all of these conditions are satisfied, the function returns `True`, indicating that the password is valid. Otherwise, it returns `False`.