Java — Which is a valid declaration within an interface?
Java Programming
Declarations and Access Control
Difficulty: Easy
Choose an option
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Apublic static short stop = 23;
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Bprotected short stop = 23;
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Ctransient short stop = 23;
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Dfinal void madness(short stop);
Answer
Correct Answer: public static short stop = 23;
Explanation
Introduction / Context:This question checks the rules for declarations inside an interface in Java.
Concept / Approach:Inside interfaces:
- Variables must be public, static, and final implicitly (even if not written).
- Methods must be abstract (before Java 8) or default/static (Java 8+).
- Access modifiers like protected and transient are invalid here.
Step-by-Step:
Option A: Legal. Interfaces can contain constants (public static final short stop = 23;).Option B: protected not allowed inside interface variables.Option C: transient is not valid for constants.Option D: final void madness(...) is invalid because interface methods cannot be final (they must be overridden unless default/static).Final Answer:public static short stop = 23;