What happens if an inner class is marked as static?

• A. It can access non-static members of the outer class
• B. It becomes a regular class
• C. It cannot be instantiated
• D. It becomes a nested class

Answer: (D)

When an inner class is marked as static, it is referred to as a static nested class. This classification is significant because it changes how the nested class interacts with its enclosing (outer) class.

A static nested class does not have a reference to an instance of its enclosing class. As a result, it cannot access non-static members (fields and methods) of the outer class directly. Instead, it can only access static members of the outer class. This behavior was a key factor in defining the scope and accessibility rules in Java, ensuring that the nested class operates independently in terms of instance data.

In terms of instantiation, a static nested class can still be instantiated and can be done so without needing an instance of the outer class. This is because it behaves somewhat like a standalone class, even though it is defined within the scope of another class.

While the static nested class shares some characteristics with regular classes, naming it a "regular class" can be misleading since it is still classified under the outer class. Thus, the description of it as a nested class aptly conveys its relationship with the outer class.

Therefore, marking an inner class as static means that it is categorized as a nested class, which retains the contextual bindings within the outer class while functioning