Given : 1. class SuperFoo { 2. SuperFoo doStuff(int x) { 3. return new SuperFoo(); 4. } 5. } 6. 7. class Foo extends SuperFoo { 8. /* insert code here*/ 9. } And four declarations: I. Foo doStuff(int x) { return new Foo(); } II. Foo doStuff(int x) { return new SuperFoo(); } III. SuperFoo doStuff(int x) { return new Foo(); } IV. SuperFoo doStuff(int y) { return new SuperFoo(); }Which, inserted independently at line 8, will compile?

Question

Given : 1. class SuperFoo {  2.  SuperFoo doStuff(int x) {  3.    return new SuperFoo();  4.  }  5. }  6.  7. class Foo extends SuperFoo {  8.    /* insert code here*/  9. }    And four declarations:  I.   Foo doStuff(int x) { return new Foo(); }  II.  Foo doStuff(int x) { return new SuperFoo(); }  III. SuperFoo doStuff(int x) { return new Foo(); }  IV.  SuperFoo doStuff(int y) { return new SuperFoo(); }Which, inserted independently at line 8, will compile?

Examsnet · Accepted Answer

Correct Answer is : Only I, III, and IV. (*)

Java SE 6 Programmer Certified Professional (1Z0-851)