Oracle
1Z0-850 · Question #9
1Z0-850 Question #9: Real Exam Question with Answer & Explanation
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Question
Given concrete class B is a subclass of concrete class A, and class A implements interface C, which two are examples of polymorphism? (Choose two.)
Options
- Ause a reference variable of type C to refer to an instance of type B
- Buse a reference variable of type A to refer to an instance of type C
- Cuse a reference variable of type C to refer to an instance of type A
- Duse a reference variable of type A to refer to an instance of type B
- Euse a reference variable of type B to refer to an instance of type A
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