4. A developer is creating an application and needs a variable to store the single letter 'b' for noting blue eyes.
Answer: A
A variable to store the single letter 'b' should be of type Character.
To store the single letter 'b', the most appropriate data type is Character, as it is specifically designed to hold single characters.
A) Character
This option is correct because the Character data type is intended for storing individual characters, such as 'b'. It efficiently represents the letter and is the most suitable choice for this specific need.
B) Integer
This option is incorrect because the Integer data type is used for storing whole numbers, not characters. Therefore, it cannot represent a single letter like 'b'.
C) Boolean
This option is also incorrect. The Boolean data type is designed to hold only two values: true or false. It does not have the capacity to store character data.
D) Character string
While this option could store the letter 'b', it is not the most efficient choice for a single character. A character string is used for sequences of characters, so it is unnecessarily complex for the requirement of storing just one letter.
Conclusion
The choice of Character is definitively the right answer as it directly fulfills the requirement of storing a single letter. All other options either misrepresent the type of data needed or introduce unnecessary complexity, making them unsuitable for this specific task.