Inheritance practice questions

InheritancePractice.java

class InheritancePractice
{
    public static abstract class Vehicle
    {
        public int maxSpeed;     // In MPH
        public int acceleration; // In 0-60MPH secs

        public Vehicle(int maxSpeed, int acceleration) {
            this.maxSpeed = maxSpeed;
            this.acceleration = acceleration;

            if (maxSpeed > 100) {
                System.out.println("Woah, fast car dude!!");
            }
            else {
                System.out.println("What a dud, man.");
            }
        }
    }

    public static class Car extends Vehicle
    {
        private String manufacturer;

        public Car(String manufacturer) {
            super(150, 10);
        }
    }

    public static class SovietKV1Tank extends Vehicle
    {
        public int ammo; // How much ammo.

        public SovietKV1Tank(int ammo) {
            this.ammo = ammo;
            System.out.println("These still exist?!");
        }

        public void FireFlakGun() {
            if (ammo > 0) {
                ammo--;
                System.out.println("BOOOOOMMMMMMMM!");
            }
        }
    }

    public static void main(String[] args) {
        System.out.println("Warmup exercises!");
    }
}

/*

1. True or false: This doesn't compile because an abstract class must have
   at least one abstract method.

2. What gets printed when the following constructor is called?

Car car = new Car();

(A) Nothing is printed.
(B) Woah, fast car dude!
(C) What a dud, man.
(D)
(E) This code doesn't compile.


3. What gets printed when the following constructor is called?

SovietKV1Tank tank = new SovietKV1Tank(500);

(A) What a dud, man.
(B) These still exist?
(C) What a dud, man. These still exist?
(D) Nothing is printed.
(E) This code doesn't compile.

4. Given the following code:

Vehicle ferrari = new Car("Ferrari");
Vehicle russianTank = new SovietKV1Tank();

Which of the following statements will *not* cause an error?

(A) System.out.println(tank.ammo);
(B) tank.FireFlakGun();
(C) System.out.println(ferrari.manufacturer);
(D) double topSpeed = ferrari.maxSpeed;
(E) All of the above will cause an error.

5. Which of the following casts (and assignments) are legal?

(A) Vehicle v = (Car)ferrari;
(B) Car v = (Car)russianTank;
(C) Car v = (Car)ferrari;
(D) Both A and C.
(E) None of the above.

*/