Exam 1z0-808 topic 1 question 119 discussion

D is correct

D is correct. incompatible types: I cannot be converted to C2 incompatible types: C2 cannot be converted to I

Letter D is correct. C2 and I are not parent/child class to each other. Implicit casting will not work. At least, we will need to explicitly cast C2 s = (C2) obj2; I t = (I) obj1;

D is correct. tested

D is correct. For this code to compile, C1 need to define the abstract method inherited from I (interface class).

even runtime objects are assignable to the references, but at compile time compiler refuse to compile, because there is not any IS-A relation between I and C2

Answer is D: class C2 { public void displayC2(){ System.out.println("C2"); } } interface I { public void displayI(); } class C1 extends C2 implements I { public void displayI() { System.out.println("C1"); } } public class Test { public static void main(String[] args) { C2 obj1 = new C1(); I obj2 = new C1(); C2 s = obj2; I t = obj1; t.displayI(); s.displayC2(); } }

B is correct.

The answer is D - Compile Error, but if the casting was done correctly then answer would be B - C1 C2

The correct answer is D Compilation fails

D. C2 and I are not parent/child class to each other. Implicit casting will not work. At least, we will need to explicitly cast C2 s = (C2) obj2; I t = (I) obj1;

Answer is D, tested.