13. An application form for a database requires that the entered values are of the Integer data type.

Answer: B

Explanation:

Whole numbers

The application form for the database specifically requires values to be of the Integer data type, which consists solely of whole numbers without any fractions or decimal points.

A) Several alphanumeric characters

This option is incorrect because alphanumeric characters include both letters and numbers, which do not meet the requirement for integer values. Integers must be strictly whole numbers, excluding any letters or characters.

B) Whole numbers

This option is correct as it aligns perfectly with the definition of Integer data types, which encompass all whole numbers, both positive and negative, as well as zero. Therefore, this option accurately reflects the requirement of the application form.

C) true or false

This option is incorrect because "true" or "false" represents Boolean values, which are not classified as integers. The requirement for the Integer data type specifically excludes any non-numeric values.

D) Precise decimal values

This option is incorrect as precise decimal values fall under the category of floating-point numbers, which include fractions and are not considered integers. The database form explicitly seeks whole numbers, making this option unsuitable.

Conclusion

The correct answer is "Whole numbers," as it directly corresponds to the Integer data type specified in the application form. All other options fail to meet the criteria for integer values, either by including characters, non-numeric values, or decimal points, thus confirming that B is the only appropriate choice.