If classes C1 and C2 both implement an interface Cint, which has a method whichIsIt, and if C1 c = new C1( ); is performed at on

Question

3 years ago

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If classes C1 and C2 both implement an interface Cint, which has a method whichIsIt, and if C1 c = new C1( ); is performed at on

e point of the program, then a later instruction c.whichIsIt( ); will invoke the whichIsIt method defined in C1.
a. True.
b, False.

Computers and Technology

1 answer:

Assoli18 [71] · Answer 1 · 2022-05-20T23:22:51+03:00

Answer:

FALSE

Explanation:

Because C1 and C2 implement the same interface, they both implement whichIsIt. The variable c is known as a polymorphic variable, meaning that it can change from being an C1 to a C2. So, the message c.whichIsIt( ); may invoke C1's whichIsIt or C2's whichIsIt. This can only be known at runtime.