Quiz Discussion

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

Which of these values can a boolean variable contain?

• 1]

  True & False

• 2]

  0 & 1

• 3]

  Any integer value

• 4]

  True

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 the following is the advantage of BigDecimal over double?

• 1]

  Syntax

• 2]

  Memory usage

• 3]

  Garbage creation

• 4]

  Precision

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

What is the output of below code snippet?

   double a = 0.02;
   double b = 0.03;
   double c = b - a;
   System.out.println(c);
 
   BigDecimal _a = new BigDecimal("0.02");
   BigDecimal _b = new BigDecimal("0.03");
   BigDecimal _c = b.subtract(_a);
   System.out.println(_c);

• 1]

  0.009999999999999998
  0.01

• 2]

  0.01
  0.009999999999999998

• 3]

  0.01
  0.01

• 4]

  0.009999999999999998
  0.009999999999999998

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 output of this program?

public class array_output {
        public static void main(String args[]) 
        {    
            char array_variable [] = new char[10];
            for (int i = 0; i < 10; ++i) {
                array_variable[i] = 'i';
                System.out.print(array_variable[i] + "" );
                i++;
            }
        } 
    }

• 1]

  i i i i i

• 2]

  0 1 2 3 4

• 3]

  i j k l m

• 4]

  None of the mentioned

Which data type value is returned by all transcendental math functions?

• 1]

  int

• 2]

  float

• 3]

  double

• 4]

  long

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