What does it mean to program to an interface Mike Wolf My OCA Mock

Question 79 / 90: What does it mean to “program to an interface”?

A Objects should be referenced by the interface they implement.

B Every object should implement at least one interface.

C Extending classes should be avoided in favor of using interfaces where possible.

D “Program to an interface” is another term for well-designed code.

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Explanation:

A. The statement “program to an interface” means that objects should be referenced by the interfaces that they implement. This creates more modular code.

B, C, and D are incorrect. None of these statements describe the concept.

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