Select the correct answerWhat type of variable can be defined in an interface?Optionsprivate finalpublic staticstatic finalpublic finalpublic static final

To choose the correct answer to the question about what type of variable can be defined in an interface, we need to understand the characteristics of interfaces in programming.

Analysis of Interface Variables

1. Interface Characteristics: In most programming languages like Java, an interface can only declare constants (variables).
2. Modifiers for Interface Variables:
   • All variables in an interface are inherently public, static, and final.
   • public: Accessible from any other class.
   • static: Shared among all instances of the interface.
   • final: Cannot be modified once initialized.

Verification of Options

1. private final: Incorrect, as interface variables cannot be private.
2. public static: Incorrect, as by default, they are final.
3. static final: Incorrect; while technically true, it omits the public modifier.
4. public final: Incorrect, as it omits the static modifier.
5. public static final: Correct, as this encompasses all the modifiers applicable to interface variables.

Final Answer

The correct answer is public static final.