Inheritance in Object-Oriented Programming

Compulsory casting each element before invoking any common operation

Consistent interaction irrespective of the object's concrete class

Increased memory usage due to additional reference variables

Decreased processing speed because every call requires checking

Yes, because the subclass has complete access to methods in the superclass, including private ones.

Only if the subclass uses a specific keyword to allow private method overriding.

No, because private methods are not accessible outside their own class. They cannot be overridden by subclasses.

Sometimes, depending on the relationship between the methods in the superclass and the subclass.

They must be changed from public to protected for security reasons.

Access privileges are required to be more restrictive than the original.

Access privileges are always set to private when overriding methods.

They should not be more restrictive than the original.

Access privileges must increase from private to public.

The method signature must be the same as the one in the superclass.

There should be additional parameters compared to the original method.

The return type of the overridden method must be a different data type.

The compiler enforces that only the subclass version can be executed, ensuring new functionality remains primary.

This precludes further overrides of the method in subsequent subclasses, locking down the original implementation from the parent class.

Subclasses can still override the method if they declare it with a different return type.

Finalization is ignored by Java runtime environment resulting in no changes to existing overriding behavior.

The subclass method will perform significantly slower due to its quadratic time complexity.

The subclass method will have no noticeable impact on performance because overriding does not change algorithmic complexity.

The subclass method will perform faster since overriding methods is an optimization technique.

The performance effect cannot be determined without knowing the specific dataset sizes involved.

It cannot be overridden

Private only

Default or package-private

Protected or public

The access level cannot be more restrictive than that of the overridden method.

Overridden methods are allowed to change any access modifier including making it private.

The overriding method should always use public access regardless of superclasses' modifier.

The access levels should always match exactly between superclass and subclass methods.

A compile-time error will occur due to ambiguity between methods.

The original version in the parent class will execute.

The virtual machine throws an exception at runtime because of improper casting.

The overridden version in the subclass will execute.

The subclass cannot access any private members or methods of its superclass without using public getters and setters.

The subclass can have methods with the same signature as methods in its superclass to provide specific behavior.

The superclass must implement all methods defined by its subclasses for proper inheritance.

Methods with the same name in both superclass and subclass must have different return types.