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Which is a valid keyword in java?

A.	interface	B.	string
C.	Float	D.	unsigned

Answer and Explanation

Answer:interface

Explanation:
interface is a valid keyword.
Option B is wrong because although "String" is a class type in Java, "string" is not a keyword.
Option C is wrong because "Float" is a class type. The keyword for the Java primitive is float.
Option D is wrong because "unsigned" is a keyword in C/C++ but not in Java.

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