Are all virtual methods abstract?
Virtual Method can reside in abstract and non-abstract class. It is not necessary to override virtual method in derived but it can be. Virtual method must have body …. can be overridden by “override keyword”…..
Can the body of a method can be empty?
3 Answers. Although it is certainly OK to have an empty method that does nothing, you should evaluate its alternative – an empty method that is missing entirely, i.e. an abstract method.
What is the difference between virtual and static class?
A static member is something that does not relate to any instance, only to the class. A virtual member is something that does not relate directly to any class, only to an instance. So a static virtual member would be something that does not relate to any instance or any class.
What’s the difference between abstract method and virtual method?
Abstract Method resides in abstract class and it has no body. Abstract Method must be overridden in non-abstract child class. Virtual Method can reside in abstract and non-abstract class. It is not necessary to override virtual method in derived but it can be.
When to use empty virtual method in base class?
If the default action is to do nothing, than as Adam mentioned, making empty virtual method in base class is perfectly valid structure When you declare the method as abstract, the inherited class has to override that method (provide an implementation). It is mandatory.
What’s the difference between abstract class and virtual class?
Both virtual and abstract classes can contain virtual methods (virtual methods can have a default implementation that is inherited by child classes, whereas abstract methods can only be signatures, and must be implemented in child classes)
Can a virtual method reside in a derived class?
Virtual Method can reside in abstract and non-abstract class. It is not necessary to override virtual method in derived but it can be. Virtual method must have body ….can be overridden by “override keyword”….. If an abstract method is defined in a class, then the class should declare as an abstract class.