Java

Determine output:

1 2 3 4

0 0 0 0

1 2

0 0

Answer

Workspace

Report

Discuss

which of the following is true about methods in an interface in java?

An interface can contain only abstract method

We can define a method in an interface

Private and protected access modifiers can also be used to declare methods in interface

None

Answer

Workspace

Report

Discuss

Which keyword is used to declare an interface in java?

class

interface

implements

abstract

Answer

Workspace

Report

Discuss

Which of these is necessary to specify at time of array initialization?

Row

Column

Both Row and Column

None of the mentioned

Answer

Workspace

Report

Discuss

What will this code print?

int arr[] = new int [5];

System.out.print(arr);

value stored in arr[0].

00000

Garbage value

Answer

Workspace

Report

Discuss

What will be the output?

public class Test{
        public static void main(String[] args){
                int[] x = new int[3];
                System.out.println("x[0] is " + x[0]);
        }
}

The program has a compile error because the size of the array wasn’t specified when declaring the array.

The program has a runtime error because the array elements are not initialized.

The program runs fine and displays x[0] is 0.

The program has a runtime error because the array element x[0] is not defined.

Answer

Workspace

Report

Discuss

Which of the following is FALSE about arrays on Java

A java array is always an object

Length of array can be changed after creation of array

Arrays in Java are always allocated on heap

None of these

Answer

Workspace

Report

Discuss

Which of these operators is used to allocate memory to array variable in Java?

malloc

alloc

new

new malloc

Answer

Workspace

Report

Discuss

In Java arrays are

objects

object references

primitive data type

None of the above

Answer

Workspace

Report

Discuss

What is the output of this program?

class mainclass {

public static void main(String args[])

{

char a = ‘A’;

a++;

System.out.print((int)a);

}

Answer

Workspace

Report

Discuss

What will the output of the following program?

public class Test{
      public static void main(String args[]){
            float f = (1 / 4) * 10;
            int i = Math.round(f);
            System.out.println(i);
      }
}

2.5

Answer

Workspace

Report

Discuss

Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?

ASCII

ISO-LATIN-1

None of the mentioned

Both a & b

Answer

Workspace

Report

Discuss

The following program:

public class Test{ 
        static boolean isOK;
        public static void main(String args[]){
                System.out.print(isOK);
        } 
}

Prints true

Prints false

Will not compile as boolean is not initialized

Will not compile as boolean can never be static

Answer

Workspace

Report

Discuss

The following fraction of code

double STATIC = 2.5 ;
System.out.println( STATIC );

Prints 2.5

Rraises an error as STATIC is used as a variable which is a keyword

Raises an exception

None of these

Answer

Workspace

Report

Discuss

What is the output of the following program?
class A{
        public static void main(String args[]){
	        byte b;
   	        int i = 258;
	        double d = 325.59;

	        b = (byte) i;
	        System.out.print(b);

	        i = (int) d;
	        System.out.print(i);

                b = (byte) d;
                System.out.print(b);
        }
}

258 325 325

258 326 326

2 325 69

Error

Answer

Workspace

Report

Discuss

Technical

Reasoning

HR Questions

GK

Entrance Exams

English

Current Affairs

Aptitude

Information

About Exams.RecruitmentIndia

Useful Links