Java OCA OCP Practice Question 2985

Question

Consider the following program: 

class Base {// w  ww  .ja  va2 s .  co  m
    public Base() {
        System.out.print("Base ");
    }
    public Base(String s) {
        System.out.print("Base: " + s);
    }
}

class Derived extends Base {
    public Derived(String s) {
        super();        // Stmt-1
        super(s);       // Stmt-2
        System.out.print("Derived ");
    }
}

public class Main {
    public static void main(String []args) {
        Base a = new Derived("Hello ");
    }
}

Select three correct options from the following list: 

a)removing only Stmt-1 will make the program compilable and it will print the following: Base Derived
b)removing only Stmt-1 will make the program compilable and it will print the following: Base: Hello Derived
c)removing only Stmt-2 will make the program compilable and it will print the following: Base Derived
d)removing both Stmt-1 and Stmt-2 will make the program compilable and it will print the following: Base Derived
e)removing both Stmt-1 and Stmt-2 will make the program compilable and it will print the following: Base: Hello Derived



b) 
c) 
d)

Note

option a) If you remove Stmt-1, a call to super(s) will result in printing Base: Hello, and then constructor of the Derived class invocation will print Derived.

hence it does not print: Base Derived.

option e) If you remove Stmt-1 and Stmt-2, you will get a compilable program but it will result in printing: Base Derived and not Base: Hello Derived.




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