Quiz Discussion

What is the output of this program?

public class mainclass {
        public static void main(String args[]) 
        {
            char a = 'A';
            a++;
            System.out.print((int)a);
        } 
    }

• 1]

  66

• 2]

  67

• 3]

  65

• 4]

  64

Which of the below data type doesn’t support overloaded methods for +,-,* and /?

• 1]

  int

• 2]

  float

• 3]

  double

• 4]

  BigDecimal

What is the range of short data type in Java?

• 1]

  -128 to 127

• 2]

  -32768 to 32767

• 3]

  -2147483648 to 2147483647

• 4]

  None of the mentioned

What is the base of BigDecimal data type?

• 1]

  Base 2

• 2]

  Base 8

• 3]

  Base 10

• 4]

  Base e

Which one is a valid declaration of a boolean?

• 1]

  boolean b1 = 1;

• 2]

  boolean b2 = ‘false’;

• 3]

  boolean b3 = false;

• 4]

  boolean b4 = ‘true’

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

What is the numerical range of a char data type in Java?

• 1]

  -128 to 127

• 2]

  0 to 256

• 3]

  0 to 32767

• 4]

  0 to 65535

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

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

• 1]

  Syntax

• 2]

  Memory usage

• 3]

  Garbage creation

• 4]

  Precision

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

• 1]

  float

• 2]

  byte

• 3]

  long

• 4]

  int