JAVA QUIZ

What is the outoput?

class Test {

protected int x, y;

}

class Main {

public static void main(String args[]) {

Test t = new Test();

System.out.println(t.x + " " + t.y);

}

}

• 0 0

• no output

• error

What is the output?

class Test

{

public static void main(String[] args)

{

for(int i = 0; 1; i++)

{

System.out.println("Hello");

break;

}

}

}

• error

• Hello

• no output

•Which of the following is a valid declaration of an object of class Box?

• a) Box obj = new Box();

• b) Box obj = new Box;

• c) obj = new Box();

• d) new Box obj;

class main_class

{

public static void main(String args[])

{

int x = 9;

if (x == 9)

{

int x = 8;

System.out.println(x);

}

}

}

• •a) 9

• b) 8

• c) Compilation error

• d) Runtime error

class box

{

int width;

int height;

int length;

}

class mainclass

{

public static void main(String args[])

{

box obj1 = new box();

box obj2 = new box();

obj1.height = 1;

obj1.length = 2;

obj1.width = 1;

obj2 = obj1;

System.out.println(obj2.height);

}

}

• •a) 1

• •b) 2

• •c) Runtime error

• •d) Garbage value

•Which of the following is not a Java features?

• •Dynamic

• •Architecture Neutral

• •Use of pointers

• •Object-oriented

public class Test

{

public static void main(String[] args)

{

int temp = 40;

if(temp == 30 && temp/0 == 4)

{

System.out.println(1);

}

else

{

System.out.println(2);

}

}

}

• a) 1

• b) 2

• c) Runtime Exception of java.lang.ArithmeticException

• d) Compilation error due to divisibility by 0

class selection_statements {

public static void main(String args[])

{

int var1 = 5;

int var2 = 6;

if ((var2 = 1) == var1)

System.out.print(var2);

else

System.out.print(++var2);

}

}

• 1

• 2

• 3

• 4

class comma_operator {

public static void main(String[] args)

{

int sum = 0;

for (int i = 0, j = 0; i < 5 & j < 5; ++i, j = i + 1)

sum += i;

System.out.println(sum);

}

}

• 5

• 6

• 10

• 14

class Test {

int a = 10;

static int b = 20;

public

static void main(String[] args)

{

Test t1 = new Test();

t1.a = 100;

t1.b = 200;

Test t2 = new Test();

System.out.println("t1.a =" + t1.a + " t1.b =" + t1.b);

System.out.println("t2.a =" + t2.a + " t2.b =" + t2.b);

}

}

• A)t1.a=100 t1.b=200

  t2.a=10 t2.b=200

• B) t1.a=10 t1.b=200

  t2.a=10 t2.b=200

• C) t1.a=100 t1.b=200

  t2.a=10 t2.b=20

• D) t1.a=100 t1.b=200

  t2.a=100 t2.b=200