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Explain Which of these access specifiers can be used for an interface?

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Which of these access specifiers can be used for an interface? (a) Public (b) Protected (c) private (d) All of the mentioned I have been asked this question in exam. This intriguing question comes from Interfaces topic in section Interfaces & Packages of Java Select the correct answer from above options

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The correct answer is (a) Public Explanation: Access specifier of an interface is either public or no specifier. When no access specifier is used then default access specifier is used due to which interface is available only to other members of the package in which it is declared, when declared public it can be used by any code.

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