Test : Java_14

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 these interface is implemented by Thread class?

Runnable	Connections
Set	MapConnections

A

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 5
5 6	6 5

D

What should be expression1 evaluate to in using ternary operator as in this line? expression1 ? expression2 : expression3

Integer	Floating ? point numbers
Boolean	None of the mentioned

C

Which of these interface handle sequences?

Set	List
Comparator	Collection

B

Which of these is an incorrect form of using method max() to obtain maximum element?

max(Collection c)	max(Collection c, Comparator comp)
max(Comparator comp)	max(List c)

C

What is the output of this program?

class string_class {
        public static void main(String args[])
        {
            String obj = "hello";
            String obj1 = "world";   
            String obj2 = obj;
            obj2 = " world";
            System.out.println(obj + " " + obj2);
        }
    }

hello hello	world world
hello world	world hello

C

Which of these operators can be used to get run time information about an object?

getInfo	Info
instanceof	getinfoof

C

Which of these keywords is used to make a class?

class	struct
int	None of the mentioned

A

Which of these method of class String is used to check weather a given object starts with a particular string literal?

startsWith()	endsWith()
Starts()	ends()

A

What is the output of this program?

 class output {
        public static void main(String args[])
        {
             String chars[] = {"a", "b", "c", "a", "c"};
             for (int i = 0; i < chars.length; ++i)
                 for (int j = i + 1; j < chars.length; ++j)
                     if(chars[i].compareTo(chars[j]) == 0)
                         System.out.print(chars[j]); 
        }
   }

ac	ca
ab	ba

A

Finish Test