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Sunday, May 25, 2014

OCJP - Oracle Certified Java Professional - Java Questions - 1


OCJP - Java Questions - 1

What is the output for the below code ?

1. public class A {
2. int add(int i, int j){
3. return i+j;
4. }
5.}
6.public class B extends A{
7. public static void main(String argv[]){
8. short s = 9;
9. System.out.println(add(s,6));
10. }
11.}
Options are
A.Compile fail due to error on line no 2
B.Compile fail due to error on line no 9
C.Compile fail due to error on line no 8
D.15
Answer :
B is the correct answer.
Cannot make a static reference to the non-static method add(int, int) from the type A. The
short s is autoboxed correctly, but the add() method cannot be invoked from a static
method because add() method is not static

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