Module: | Classes, Objects, OOPs & Inheritance
Q27: Consider the following statements regarding Java Access Modifiers:
1. If no access modifier is explicitly declared for a variable or method, it is automatically assigned the 'default' (package-private) modifier, restricting access strictly to within the same package.
2. The 'protected' access modifier allows a variable to be accessed by any class within its own home package, as well as by child subclasses located in completely different external packages.
3. A top-level class declaration in a Java file can be legally assigned the 'private' or 'protected' access modifiers to securely encapsulate the application's core architecture.
Which of the above statements is/are correct?
2. The 'protected' access modifier allows a variable to be accessed by any class within its own home package, as well as by child subclasses located in completely different external packages.
3. A top-level class declaration in a Java file can be legally assigned the 'private' or 'protected' access modifiers to securely encapsulate the application's core architecture.
Which of the above statements is/are correct?
✅ Correct Answer: A
🎯 Quick Answer:
The correct combination is 1 and 2. Statement 3 is incorrect because top-level classes in Java can only be declared as 'public' or 'default' (package-private). Only nested inner classes can be marked as private or protected.Structural Breakdown: The visibility hierarchy from most restrictive to least is: Private (same class only) -\> Default (same package only) -\> Protected (same package + external subclasses) -\> Public (global access). Historical/Related Context: The 'protected' modifier is highly critical for framework development.
It allows framework creators to write core logic that external users cannot arbitrarily invoke from standard instances, but allows those users to extend the framework via inheritance and safely override those protected lifecycle methods.
Causal Reasoning: A top-level class cannot logically be declared 'private' because if the class itself is invisible to the outside world, no external entity or ClassLoader could ever discover it to instantiate an object, rendering the file completely useless to the application.