Quiz Discussion

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 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 data type value is returned by all transcendental math functions?

• 1]

  int

• 2]

  float

• 3]

  double

• 4]

  long

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

What is the base of BigDecimal data type?

• 1]

  Base 2

• 2]

  Base 8

• 3]

  Base 10

• 4]

  Base e

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 numerical range of a char data type in Java?Which of these coding types is used for data type characters in Java?

• 1]

  -128 to 127 ASCII

• 2]

  0 to 256 ISO-LATIN-1

• 3]

  0 to 32767 UNICODE

• 4]

  0 to 65535 UNICODE

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

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

• 1]

  float

• 2]

  byte

• 3]

  long

• 4]

  int

Which of these values can a boolean variable contain?

• 1]

  True & False

• 2]

  0 & 1

• 3]

  Any integer value

• 4]

  True