Which method of a class can be declared protected?

• A. Only static methods
• B. Only abstract methods
• C. Any method
• D. No methods can be protected

Answer: (C)

In Java, the access modifier "protected" can be applied to any non-private member of a class, including instance methods, static methods, and abstract methods. When a method is declared as protected, it means that the method can be accessed by classes in the same package and by subclasses (even if they are in different packages).

This flexibility allows for a robust way to control access while enabling inheritance, promoting encapsulation and code reuse. Therefore, since there are no restrictions on the type of method that can be marked as protected—given that it can apply to static, instance, and abstract methods—asserting that any method can be declared as protected is accurate.

The other options suggest limitations that do not align with the Java access control model. For instance, declaring only static methods or only abstract methods as protected is too restrictive and does not reflect the capabilities of the protected access modifier in Java. Additionally, stating that no methods can be protected contradicts the fundamental principles of access control that Java supports.