Quiz Discussion

What will be the output of the following Java code? - Area Of Circle

public class area {
        public static void main(String args[]) 
        {    
             double r, pi, a;
             r = 9.8;
             pi = 3.14;
             a = pi * r * r;
             System.out.println(a);
        } 
    }

• 1]

  301.5656

• 2]

  301

• 3]

  301.56

• 4]

  301.56560000

What will be the output of the following Java code? - Increment / Decrement

public class increment {
   public static void main(String args[]) 
     {        
         int g = 3;
         System.out.print(++g * 8);
     } 
}

• 1]

  25

• 2]

  24

• 3]

  32

• 4]

  33

What will be the output of the following Java code? - Average

public class average {
   public static void main(String args[])
     {
         double num[] = {5.5, 10.1, 11, 12.8, 56.9, 2.5};
         double result;
         result = 0;
         for (int i = 0; i < 6; ++i) 
         {
           result = result + num[i];
         } 
	    System.out.print(result/6);
 
      } 
  }

• 1]

  16.34

• 2]

  16.566666644

• 3]

  16.46666666666667

• 4]

  16.46666666666666

What will be the output of these statement?

public class output {
        public static void main(String args[]) 
        {
            double a, b, c;
            a = 3.0/0;
            b = 0/4.0;
            c = 0/0.0;
 
	        System.out.println(a);
            System.out.println(b);
            System.out.println(c);
        } 
    }

• 1]

  Infinity

• 2]

  0.0

• 3]

  NaN

• 4]

  all of the mentioned

Which of the following is the advantage of BigDecimal over double?

• 1]

  Syntax

• 2]

  Memory usage

• 3]

  Garbage creation

• 4]

  Precision

Which of these literals can be contained in float data type variable?

• 1]

  -1.7e+308

• 2]

  -3.4e+038

• 3]

  +1.7e+308

• 4]

  -3.4e+050

Which of the following are legal lines of Java code?

   1. int w = (int)888.8;
   2. byte x = (byte)100L;
   3. long y = (byte)100;
   4. byte z = (byte)100L;

• 1]

  1 and 2

• 2]

  2 and 3

• 3]

  3 and 4

• 4]

  All statements are correct

What is the range of byte data type in Java?

• 1]

  -128 to 127

• 2]

  -32768 to 32767

• 3]

  -2147483648 to 2147483647

• 4]

  None of the mentioned

Which of these values can a boolean variable contain?

• 1]

  True & False

• 2]

  0 & 1

• 3]

  Any integer value

• 4]

  True

An expression involving byte, int, and literal numbers is promoted to which of these?

• 1]

  float

• 2]

  byte

• 3]

  long

• 4]

  int