INHERITANCE AND POLYMORPHISM - Introduction to Java Programming: Comprehensive Version - page 426

13 System.out.print(o + " " );
14 System.out.println();
15 }
16 }

11.21

Show the output of the following code:

public class Test {
public static void main(String[] args) {
new Person().printPerson();
new Student().printPerson();

public class Test {
public static void main(String[] args) {
new Person().printPerson();
new Student().printPerson();

}
}

}
}

class Student extends Person {
@Override
public String getInfo() {
return "Student" ;

class Student extends Person {
private String getInfo() {
return "Student" ;

}
}

}
}

class Person {
private String getInfo() {
return "Person" ;

class Person {
public String getInfo() {
return "Person" ;

}

}

public void printPerson() {
System.out.println(getInfo());
}
}

public void printPerson() {
System.out.println(getInfo());
}
}

(a) (b)

11.22

Show the output of following program:

1 public class Test {
2 public static void main(String[] args) {
3 A a = new A( 3 );
4 }
5 }
6
7 class A extends B {
8 public A( int t) {
9 System.out.println( "A's constructor is invoked" );
10 }
11 }
12
13 class B {
14 public B() {
15 System.out.println( "B's constructor is invoked" );
16 }
17 }

Is the no-arg constructor of Object invoked when new A(3) is invoked?
11.23

Show the output of following program:

public class Test {
public static void main(String[] args) {
new A();
new B();

}
}