A class can be declared as __________ if it should not be sub classed.Select one:a.finalb.privatec.publicd.protected

Answer:

The correct answer is a. final.

Explanation:

In object-oriented programming, particularly in languages like Java, when you declare a class as final, it means that the class cannot be subclassed. This is an important feature in the design of classes, as it allows developers to create immutable classes that provide a defined behavior and prevent modification through inheritance. Subclassing often opens up the possibility of altering the functionality of the parent class, but by marking a class as final, you are ensuring that the integrity of that class's methods and properties remains intact.

Other options like private, public, and protected relate to access modifiers that control the visibility of class members (attributes and methods) rather than preventing a class from being subclassed. Thus, to answer the question, the class must be declared with the final keyword to prevent subclassing.