Test : Java_17

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

0	05
Compilation Error	Runtime Error

B

What is the output of this program?

import java.util.*;
    class vector {
        public static void main(String args[]) {
            Vector obj = new Vector(4,2);
            obj.addElement(new Integer(3));
            obj.addElement(new Integer(2));
            obj.addElement(new Integer(5));
            obj.removeAll(obj);
            System.out.println(obj.isEmpty());
        }
    }

0	1
True	False

C

firstly elements 3, 2, 5 are entered in the vector obj, but when obj.removeAll(obj); is executed all the elements are deleted and vector is empty, hence obj.isEmpty() returns true. Output: $ javac vector.java $ java vector true

Which of these method of class String is used to compare two String objects for their equality?

equals()	Equals()
isequal()	Isequal()

A

Which of these handles the exception when no catch is used?

Default handler	throw handler
finally	Java run time system

A

Which of the following is a method having same name as that of its class?

finalize	delete
constructor	class

C

What is Collection in Java?

A group of objects	A group of classes
A group of interfaces	None of the mentioned

A

A collection is a group of objects, it is similar to String Template Library (STL) of C++ programming language.

Which of these statements are incorrect?

Equal to operator has least precedence.	Brackets () have highest precedence.
Division operator, /, has higher precedence than multiplication operator.	Addition operator, +, and subtraction operator have equal precedence

C

Which of these method of String class is used to obtain character at specified index?

char()	Charat()
charat()	charAt()

D

What is synchronization in reference to a thread?

Its a process of handling situations when two or more threads need access to a shared resource.	Its a process by which many thread are able to access same shared resource simultaneously.
Its a process by which a method is able to access many different threads simultaneously.	Its a method that allow to many threads to access any information the require.

A

What is the output of this program?

class ternary_operator {
        public static void main(String args[]) 
        {        
             int x = 3;
             int y = ~ x;
             int z;
             z = x > y ? x : y;
             System.out.print(z);
        } 
    }

0	1
3	-4

C

Finish Test