Question

Analyze the following code and choose the best answer:

public class Foo {
private int x;

public static void main(String[] args) {
Foo foo = new Foo();
System.out.println(foo.x);
}
}
possible answers:
a. Since x is private, it cannot be accessed from an object foo.
b. You cannot create a self-referenced object; that is, foo is created inside the class Foo.
c. Since x is an instance variable, it cannot be directly used inside a main method. However, it can be accessed through an object such as foo in this code.
d. Since x is defined in the class Foo, it can be accessed by any method inside the class without using an object. You can write the code to access x without creating an object such as foo in this code.

Answer 1

The answer to this question is "option c".

Explanation:

In this question, the correct option is option c. The variable x is an instance variable(a variable i.e defined without the static keyword and declare outside the method). This variable can't be used directly inside the main function. To access this variable we first create an object of the class then we call variable.

All the other options are not correct that can be explained as:

Option (a) is not correct because variable x is a private variable and it can be accessed only by an object that is foo(object name) inside the Foo class(class name).

Option (b) is not correct because variable x is a non-static variable and it can't be accessed in the main method. To access this variable firstly we create an object then we can access the variable.

Option (d) is not correct because variable x is permissible to create an instance of the class within the class.

So the correct answer to this question is option c.