Public class Car { public void m1() {
System. out. println("car 1");
}
â
public void m2() {
System. out. println("car 2");
}
â
public String toString() {
return "vroom";
}
}

public class Truck extends Car {
public void m1() {
System. out. println("truck 1");
}
}

And assuming that the following variables have been declared:

Car mycar = new Car();
Truck mytruck = new Truck();

What is the output from the following statements?

a. Sound F/X System. out. println(mycar);
b. mycar. m1();
c. mycar. m2();
d. System. out. println(mytruck);
e. mytruck. m1();
f. mytruck. m2();

The Following are the outputs:

a. vroom

b. car 1

c. car 2

d. vroom

e. truck 1

f. car 2

Explanation:

The first statement System.out.println(mycar);  prints an instance of the Car object my car which calls the toString() method.

The second statement mycar.m1();  Calls the method m1() which prints car1

The third statement mycar.m2(); calls the method m2() which prints car2

Then another class is created Truck, and Truck inherits all the methods of Car since it extends Car. Truck has a method m1() which will override the inherited method m1() from the Car class.

The fourth statement System.out.println(mytruck); will print print vroom just as the first statement since it inherits that method toString()

The fifth statement calls m1() in the Truck class hence prints Truck 1

Finally the sixth statement will print car 2 because it also inherited that method and didnt overide it.

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explanation:

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