Quiz on Java Data Types

What should be the Boolean Value for b to print inside system.out.println?

class DataFlair {

    public static void main(String args[])

    {

        boolean b = ????;

        if (b == true)

            System.out.println(“Welcome to DataFlair Webservices”);

    }

}

What will be the output of the program ?

class Demo {

    public static void main(String args[])

    {

        byte a = 127;

        System.out.println(a);

        a++;

        System.out.println(a);

        a++;

        System.out.println(a);

        a++;

        System.out.println(a);

    }

}

Data value for short ranges between?

Which of these coding types is used for char data sets that range from 0 to 65536?

What data type should be assigned to the c variable to expect a desired output?

class sample {

public static void main(String args [] ) {

int a = 3;

int b = 5;

_____ c = a/b;

system.out.println(“The answer is “ + c);

}

     }

Which variable is best suited to display time in milliseconds in this program?

 import java.util.*;

public class JavaLongExample {

public static void main(String[] args) {

**** timeInMilliseconds = new Date().getTime();

System.out.println(“Time in milliseconds is : ” + timeInMilliseconds);

}

}

What will be the output of the program?

class demo {

public static void main(String args [])

{

float name = “DataFlair”;

system.out.println(name);

}

}

What will be the output of the program?

class datatype {

public static void main( String args [] )

{

int p = 123;

int q = 114;

long r = p * q;

system .out.println(r);

}

}

What is the output of the program?

class area {

public static void main (String args []) 

{

int r = 3;

float pi = 3.14;

int a = pi * r * r;

system.out.println(“The area of the circle is “ + a );

}

}

Which of the following programs calculate the area of the rectangle by getting input from the user?

Which of the following formulas is correct to calculate the diameter of the circle? 

class diameter {

public static void main ( String args [] )

{

float radius = 5.69;

***************

system.out.println(“Diameter of the circle is “ + diameter);

}

}

What will be the output of the program?

Class character {

Public static void main ( String args [] )

{

Char = a,b,c,d,e,f,g,h,i;

a= 68;

b = 65;

c = 84;

d = 65;

e = 70;

f = 76;

g = 65;

h = 73;

i = 82;

system.out.println(a + b + c + d + e + f + g + h + i );

}

}

Which of the following is not a signed data type in Java?

What will be the output of the program?

public class example {

        public static void main( String args [] )

       { 

        String str = “welcome”;

        System.out.println(str.charAt(0));

        System.out.println(str.charAt(1));

        System.out.println(str.charAt(2));

        System.out.println(str.charAt(3));

        System.out.println(str.charAt(4));

        System.out.println(str.charAt(5));

        System.out.println(str.charAt(1));

    }

}

What is the correct way of assigning a value to a float data type variable during the declaration?