Question: Consider the following class definitions: class A {public void foo() {}} class B extends A {public void bar() {}} class C extends B {public void

Consider the following class definitions: class A {public void foo() {}}

Consider the following class definitions: class A {public void foo() {}} class B extends A {public void bar() {}} class C extends B {public void bar() {}} What reference types may be used to refer to an object of type C? What does the instance Of keyword do? Why might we use it? Interfaces differ from abstract classes in two important ways. What are they

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