Which statements are true for both abstract classes and interfaces? (Choose all that apply *4 pointsA. All methods within them are assumed to be abstract.B. Both can contain public static final variables.C. Both can be extended using the extend keyword.D. Both can contain default methods.E. Both can contain static methods.F. Neither can be instantiated directly.G. Both inherit java.lang.Object.
Question
Which statements are true for both abstract classes and interfaces? (Choose all that apply *4 pointsA. All methods within them are assumed to be abstract.B. Both can contain public static final variables.C. Both can be extended using the extend keyword.D. Both can contain default methods.E. Both can contain static methods.F. Neither can be instantiated directly.G. Both inherit java.lang.Object.
Solution
The correct statements that are true for both abstract classes and interfaces are:
A. All methods within them are assumed to be abstract. B. Both can contain public static final variables. D. Both can contain default methods. E. Both can contain static methods. F. Neither can be instantiated directly.
Statement C is not correct because interfaces are not extended, they are implemented. Statement G is also not correct because interfaces do not inherit from java.lang.Object.
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