Question

1: Answer these questions:

(a) Write a Java program to print whole numbers between 1 to 1000 which are divisible by 3, 5 and by both numbers.
(b) Differentiate between instance and local variable in Java
(c) In a tabular form, differentiate between instance and class variable

Answer 1

(a)

Source Code:

class ex
{
   public static void main(String[] args) {
       for(int i=1;i<=1000;i++)
       {
           if(i%3==0 && i%5==0)
           {
               System.out.println(i);
           }
       }
   }
}

Sample input and output:

(b)

Differences between instance and local variable in Java :

Instance Variables:

Variables that are declared inside the class but outside of the methods of class.

Ex: class Student{

String name;

int id;

}

Local variables:

Variables that are declared in any method, constructor or any block is considered as local variables.

Ex: int age;

String name ;

(c)

differences between instance and class variable :

Instance Variables	Class Variables
1.variables declared inside class but ouside of methods.	1. Variables of a class declared as final or static.
2. These variables are referenced with objects.it means every object have these variables once initialized.	2. The values of this variables does not change.
3. These variables need to be private in order to satisfy the Encapsulation and other features.	3. we must use static keyword before it. and the access specifier is public in nature