Question 23

One example of Boolean data is whether a number is positive or not.

Boolean data represents values that can only be true or false, making option D the correct choice.

A) The last name of a newly hired employee

This option is incorrect because a last name is a string value and does not represent a true or false condition. It does not fit the criteria of Boolean data as it can have many possible values.

B) The price of gas in dollars and cents

Option B is also incorrect. The price of gas is a numerical value that can vary widely and does not conform to the true/false dichotomy characteristic of Boolean data.

C) The first letter of a person's last name

This option is incorrect as well. The first letter of a last name is a character and can be any letter from the alphabet, which does not represent a Boolean state. It does not provide a true or false distinction.

D) Whether a number is positive or not

This option is correct because it presents a clear Boolean condition. A number can either be positive (true) or not (false), making it a perfect example of Boolean data.

Conclusion

The correct answer, option D, accurately represents a Boolean condition, distinguishing between two states: positive or not. The other options fail to meet the criteria for Boolean data, as they involve values that do not fit the true/false framework. Thus, option D is the only choice that exemplifies Boolean data effectively.