Sun Certified Java Programmer (SCJP) Questions

Which of the choices below can legally be inserted at the "insert code here" position in the following code?

class Parent
{

public void print(int i)

{
}

}

public class Child extends Parent
{

public static void main(String argv[])
{
}

// insert code here

}

Choices:

A. public void print(int i, byte b) throws Exception {}

B. public void print(int i, long i) throws Exception {}

C. public void print(long i) {}

D. public void print(int i) throws Exception {}

E. public int print(int i)

Correct choices:

A, B, and C

Explanation:

Option D will not compile because it attempts to throw a checked exception that is not declared in the Parent class. Option E will not compile because only the return type is different; the argument list and method name are the same. This is not allowed in both overriding and overloading. Options A, B, and C have different argument lists, so they represent overloading, not overriding. Because they can throw any exceptions, they are legal