Automatic type promotion questions on java and answer with solution

Java objective questions on automatic type promotion and answers  

(1)

public class TypeConversion {

    public static void main(String[] args) {

         {

             final int a='\15';

             System.out.println(a);

         }

         int a=25;byte b=0100;

         a=a+b;

         System.out.println(a);

    }

}

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

(a)15

   125

(b)13

   89

(c)Run time exception

(d) Compiler error

(2)

public class TypeConversion {

    public static void main(String[] args) {

         float f=12e-1F;

         final long l=12L;

         f=f+l;

         System.out.println(f);

    }

}

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

(a)18.9

(b)13.2

(c)Run time exception

(d) Compiler error

Answer: (b)

(3)

public class TypeConversion {

    public static void main(String[] args) {

         char a=5;

         short b=-++a;

         System.out.println(b);

    }

}

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

(a)-4

(b)-5

(c)-6

(d) Compiler error

Answer: (d)

(4)

public class TypeConversion {

    public static void main(String[] args) {

         boolean b=11>=11;

         String str=(String)b;

         System.out.println(str);

    }

}

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

(a)true

(b)false

(c)”true”

(d) Compiler error

Answer: (d)

(5)

public class TypeConversion {

    public static void main(String[] args) {

         byte b=016;

         short s=0x16;

         char c='\16';

         int a=b+s+c;

         System.out.println(a);

    }

}

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

(a)48

(b)50

(c)Run time exception

(d) Compiler error

Answer: (b)


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