Test : Java_5

This test contains 10 questions based on Java.
Each question answered correctly awards you 1 point and each incorrect answer has a penalty of -0.25 points, no points are deducted for unattempted answers.

Select Test Type

You Get +1 for each correct answer and -0.25 for each incorrect answer

Time Left - minutes :seconds

What is the output of this program?

class box {
        int width;
        int height;
        int length;
    } 
    class mainclass {
        public static void main(String args[]) 
        {        
             box obj = new box();
             obj.widht = 10;
             obj.height = 2;
             obj.length = 10;
             int y = obj.widht * obj.height * obj.length; 
             System.out.print(y);
        } 
    }

12	200
400	100

B

What will be the output of the following code:

public class Point extends Shape {

 static int x, y;
 public Point() {
  x = 0;
  y = 0;
 }
 public double area() {
  return 0;
 }
 public double perimeter() {
  return 0;
 }
 public static void print() {
  System.out.println("point: " + x + "," + y);
 }
 public static void main(String args[]) {
  Point p = new Point();
  p.print();
 }
}

None	point: 0, 0
point: 1, 1	point: 0, 1

B

Which of these method of String class can be used to test to strings for equality?

isequal()	isequals()
equal()	equals()

D

What is the output of this program?

 class output {
        public static void main(String args[])
        { 
           String s1 = "Hello";
           String s2 = new String(s1);
           String s3 = "HELLO";
           System.out.println(s1.equals(s2) + " " + s2.equals(s3));
        }
    }

true true	false false
true false	false true

C

Which of these lines will give an error line 1. int a=1,b=2; line 2. float c=2.0F; line 3. System.out.println((a==c)+""+(c==b));

line 2 & line 3	line 3 only
line 2 only	none of these

D

it will compile and run successfully falsetrue

Which of these is an abstract class?

Thread	Runnable
Multithread	System

A

What is the output of this program?

 class A {
        public int i;
        protected int j;
    }    
    class B extends A {
        int j;
        void display() {
            super.j = 3;
            System.out.println(i + " " + j);
        }
    }    
    class Output {
        public static void main(String args[])
        {
            B obj = new B();
            obj.i=1;
            obj.j=2;   
            obj.display();     
        }
   }

1 2	2 1
3 1	1 3

A

Which of these method of Thread class is used to suspend a thread for a period of time?

sleep()	terminate()
suspend()	stop()

A

What is the return type of Constructors?

int	float
void	None of the mentioned

D

Constructors does not have any return type, not even void.

What is the output of this program?

 class area {
        int width;
        int length;
        int area;
        void area(int width, int length) {
            this.width = width;
            this.length = length;
        }
 
    }    
    class Output {
        public static void main(String args[])
        {
            area obj = new area();
            obj.area(5 , 6);
            System.out.println(obj.length + " " + obj.width);        
        } 
    }

0 0	5 6
6 5	6 6

C

Finish Test