Test : Java_25

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

Which of the following methods belong to the String class? 1. length() 2. compareTo() 3. equals() 4. substring()

Length(), & compareTo()	Equals()
All of these	None of these

C

What is the length of the application box made by this program?

 import java.awt.*;
    import java.applet.*;
    public class myapplet extends Applet {
        Graphic g;
        g.drawString("A Simple Applet", 20, 20);    
    }

20	Default value
Compilation Error	Runtime Error

C

What is the output of this program?

 class string_class {
        public static void main(String args[])
        {
            String obj = "I LIKE JAVA";   
            System.out.println(obj.charAt(3));
        } 
    }

I	L
K	E

A

Objects of a super class cannot always be assigned to a subclass reference. This can only happen if they are in

Interference	Abstract Class
Inheritance	None of the above

B

What is the name of the thread in output of this program?

 class multithreaded_programing {
        public static void main(String args[]) {
            Thread t = Thread.currentThread();
            System.out.println(t.getPriority());        
        }
    }

0	1
4	5

D

What is the output of this program?

 class exception_handling {
        public static void main(String args[]) {
            try {
                int i, sum;
                sum = 10;
                for (i = -1; i < 3 ;++i) {
                    sum = (sum / i);
                System.out.print(i);
                }
            }
            catch(ArithmeticException e) {      
                System.out.print("0");
            }
        }
    }

-1	-101
-10	0

C

When we implement the Runnable interface, we must define the method

start()	run()
main()	init()

B

What is the output of this program?

 class equality {
        int x;
        int y;
        boolean isequal() {
            return(x == y);  
        } 
    }    
    class Output {
        public static void main(String args[])
        {
            equality obj = new equality();
            obj.x = 5;
            obj.y = 5;
            System.out.println(obj.isequal);        } 
    }

true	false
0	1

A

What is the output of this program?

 import java.util.*;
    class Maps {
        public static void main(String args[]) {
            TreeMap obj = new TreeMap();
            obj.put("A", new Integer(1));
            obj.put("B", new Integer(2));
            obj.put("C", new Integer(3));
            System.out.println(obj.entrySet());
        }
    }

[A=1, B=2, C=3]	[1, 2, 3]
[A, B, C]	{A=1, B=2, C=3}

A

what will be the output int a=0x0055; System.out.println(a);

5	55
85	none of these

C

0x represents a hexadecimal number, therefore 0x0055 =16¹x5 + 16⁰x5 =80+5 =85

Finish Test