Question 67

Character is the appropriate data type for restricting values to single alphanumeric symbols.

Using the Character data type ensures that the database field can only store single characters, which aligns with the requirement for single alphanumeric symbols.

A) Floating point

Floating point data types are designed for storing numerical values with decimals and are not suitable for restricting values to single alphanumeric symbols. This option would allow for a range of numbers and decimal points, which does not meet the specified criteria.

B) Character string

Character string data types allow for multiple characters to be stored, which means they could contain more than one alphanumeric symbol. This option fails to restrict the values to single symbols, making it an inappropriate choice for the requirement.

C) Integer

Integer data types are used for whole numbers without fractional components, thus they cannot store alphanumeric symbols at all. This makes integer an unsuitable option for the requirement of single alphanumeric symbols.

D) Character

The Character data type is specifically designed to hold single characters, making it the ideal choice for storing single alphanumeric symbols. It restricts entries to one character, effectively meeting the requirement laid out in the question.

Conclusion

Character is definitively the correct choice as it restricts inputs to single alphanumeric symbols, perfectly aligning with the question’s requirement. In contrast, the other options—Floating point, Character string, and Integer—fail to meet the criteria by allowing either multiple characters or unsuitable formats for the data needed.