Java objective questions and answer with solution

(1)

public class This {

    public static void main(String[] args) {

         int a=5,b=10,c=8;

         long s=a>b?c:a>c?b=+b++:++b;

         System.out.print(s);

    }

}

What will output when you compile and run the above code?

(a)11

(b)21

(c)20

(d)Compiler error

Answer: (a)

(2)

public class BreakDemo {

    public static void main(String[] args){

         String[][]alpha={{"a"},{"b","c"}};

         for(String str[]:alpha)

         {

             for(String s:str)

             {

                 System.out.print(s+" ");

                 if(s.equals("b")) return;

                

             }

         }

    }

}

What will be output of above program?

(a)a null

(b)a null b

(c)a b

(d)Compiler error

Answer:(c)

(3)What will be output of following program?

public class Datatype {

    public static void main(String[] args) {

         byte b=125;

         b=(byte)(b*2);

         System.out.println(b);

            

    }

}

(a)15

(b)12

(c)9

(d)6

Answer: ()

(4) Which of the following is not primitive data type?

(a) int

(b) char

(c) String

(d) double

Answer: (c)

Explanation:

String is not a keyword of java. It is class of java which has been defined in java.lang.String

(5)

class Operator

{

    public static void main(String[] args)

    {

         int a=5;

         int c=0;

         c=+-a+++a;

         System.out.println(c);

    }

}

What will output when you compile and run the above code?

(a)0

(b)1

(c)-11

(d)Compiler error

Answer: (b)

Java placement questions and answer with solution

(1)

public class This {

    public static void main(String[] args) {

         int a=5,b=10,c=8;

         double s=true?5F:"string";

         System.out.print(s);

    }

}

What will output when you will compile and run the above code?

(a)5

(b)null

(c)Run time exception

(d)Compiler error

Answer: (d)

(2)

public class BreakDemo {

    public static void main(String[] args){

         int a=2;

             if(a==2)

                 break first;

             System.out.print("step1");

             first:

             System.out.println("step2");

    }

}

What will be output of above program?

(a)step1

(b)step2

(c)step2

   Step1

(d)Compiler error

Answer:(d)

(3)What will be output of following program?

public class Datatype {

    public static void main(String[] args) {

         short b=1000;

         b=b*5;

         System.out.println(b);

            

    }

}

What will output when you compile and run the above code?

(a)5000

(b)5000h

(c)5000H

(d) Compiler error

Answer: (d)

Explanation:

(4)

class BitwiseOperator

{

    public static void main(String[] args)

    {

         byte a=-10;

         int b=(a>>>2)%(a<<<2);

         System.out.println(b);

    }

}

What will output when you compile and run the above code?

(a)0

(b)-1

(c)-3

(d)Compiler error

Answer: (d)

(5)

class Operator

{

    public static void main(String[] args)

    {

         int a;

         a=(new Operator()).calulate();

         System.out.println(a);

    }

    int calulate()

    {

         int p=0,q=2;

         p=q+~p+ ++3;

         int r= true ? return p: return 10;

    }

}

What will output when you compile and run the above code?

(a)10

(b)5

(c)-3

(d)Compiler error

Answer: (d)

Java interview questions and answer with solution

(1)

public class This {

    public static void main(String[] args) {

         int a=5,b=10,c=8;

         double s=true?5D:void;

         System.out.print(s);

    }

}

What will output when you compile and run the above code?

(a)5

(b)0

(c)NaN

(d)Compiler error

Answer: (d)

(2)

public class BreakDemo {

    public static void main(String[] args){

         int a=2;

         india: {

             ++a;

             if(a==3)

                 break india;

         }

             System.out.print(a);

            

    }

}

What will be output of above program?

(a)3

(b)4

(c)2

(d)Compiler error

Answer: (a)

(3)

public class Datatype {

    public static void main(String[] args) {

         long a=10;

         long b=20;

         long c=a-~b-1;

         System.out.println(c);

            

    }

}

What will output when you compile and run the above code?

(a)-10

(b)-11

(c) 30

(d) Compiler error

Answer :  (c)

Explanation:

(4)

public class EnumTest {

    public static void main(String[] args) {

         short a=5,b=10,c=11;

         int d=a&b^c|10;

         System.out.print(d);

    }

}

What will output when you compile and run the above code?

(a)0

(b)1

(c)11

(d)Compiler error

Answer: (c)

(5)

class Operator

{

    public static void main(String[] args)

    {

         int a=1,b=1,c=0;

         c=++a + b++;

         System.out.println(a+","+b+","+c);

    }

   

}

What will output when you compile and run the above code?

(a)2,2,3

(b)2,1,3

(c)2,4,2

(d)Compiler error

Answer: (a)