COSC 121 Exam Questions and Answers Latest Update Graded A+

COSC 121 Exam Questions and Answers Latest Update Graded A+

If a subclass provides a specific implementation of a method that is already provided by its parent class,
it is known as Method Overloading - Answers False

Correct the following code



public class D {

private double mass;

D() {

this(10.);

System.out.println("No-arg constructor");

}

D(double mass){

System.out.println("Constructor");

mass = mass;

}

public double getMass() {

return mass;

}

public void setMass(double mass) {

D.mass = mass;

}

} - Answers public class D {

private double mass;

D() {

this(10.);

System.out.println("No-arg constructor");

,}

D(double mass){

System.out.println("Constructor");

this.mass = mass;

}

public double getMass() {

return mass;

}

public void setMass(double mass) {

this.mass = mass;

}

}

What is the output of the following statements:



Truck mycar = new Truck();

System.out.println(mycar);

if we have the following classes:

public class Car {

public void m1() {

System.out.println("car 1");

}



public void m2() {

System.out.println("car 2");

}

, public String toString() {

return "general car";

}

}

public class Truck extends Car {

public void m1() {

System.out.println("truck 1");

}

} - Answers general car

Match each code fragment to the correct type of relationship



class Truck{

Engine engine;

Truck(){

Engine engine = new Engine();

engine.start();

}

} - Answers Composition

class Truck{

Engine engine;

Truck(Engine engine){

this.engine = engine;

engine.start();

}