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25 December, 02:15

Which of the following is true about interfaces: A. Can not contain constants but can have variables. B. None of the items listed. C. All methods in an interface must be abstract. D. A class can only implement one interface. E. An interface can have only non abstract methods.

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  1. 25 December, 02:31
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    C. All methods in an interface must be abstract.
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