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04. Consider the following two classes (in the same package but defined in different source files):

public class Square {
double side = 0;
double area;

public Square(double length){
this.side = length;
}
public double getSide() {
return side;
}
public void setSide(double side) {
this.side = side;
}
double getArea() {
return area;
}
}
public class TestClass {
public static void main(String[] args) throws Exception {
Square sq = new Square(10.0);
sq.area = sq.getSide()*sq.getSide();
System.out.println(sq.getArea());
}
}

You are assigned the task of refactoring the Square class to make it better in terms of encapsulation. What changes will you make to this class?

Select 2 options

A. Make setSide() method private.

B. Make getArea() method private.

C. Make side and area fields private.

D. Make the side field private and remove the area field.

E. Change getArea method to:
public double getArea(){ return side*side; }

F. Add a setArea() method.

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03. What will the following program print?

class LoopTest
{
public static void main(String args[])
{
int counter = 0;
outer:
for (int i = 0; i < 3; i++) {
middle:
for (int j = 0; j < 3; j++) {
inner:
for (int k = 0; k < 3; k++) {
if (k - j > 0) {
break middle;
}
counter++;
}
}
}
System.out.println(counter);
}
}

Select 1 option

A. 2

B. 3

C. 6

D. 7

E. 9

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02. What will be the result of compiling and running the following program ?

class NewException extends Exception {}

class AnotherException extends Exception {}

public class ExceptionTest{

public static void main(String[] args) throws Exception{
try{
m2();
}
finally{
m3();
}
catch (NewException e) { }
}
public static void m2() throws NewException { throw new NewException();

public static void m3() throws AnotherException{ throw new AnotherException();
}

Select 1 option

A. It will compile but will throw AnotherException when run.

B. It will compile but will throw NewException when run.

C. It will compile and run without throwing any exceptions.

D. It will not compile.

E. None of the above.

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01. Given:

class Triangle{
public int base;
public int height;
private static double ANGLE;

public static double getAngle();

public static void Main(String[] args)
{
System.out.println(getAngle());
}
}

Identify the correct statements:

Select 1 option

A. It will not compile because it does not implement setAngle method.

B. It will not compile because ANGLE cannot be private.

C. It will not compile because getAngle() has no body.

D. It will not compile because ANGLE field is not initialized.

E. It will not compile because of the name of the method Main instead of main.

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