|1||Does c# support multiple-inheritance ?||No. Multiple inheritance is not possible in .NET. This means it is not possible for one class to inherit from multiple classes. However, a class may implement multiple interfaces. We may also declare objects of different classes in a class. This way, the encapsulated class may be instantiated in other classes.|
|2||Do events have return type ?||Events do not have return type.|
|3||Can you override private virtual methods ?||No, we cannot access private methods in inherited classes.|
|4||Can you allow class to be inherited, but prevent the method from being over-ridden ?|
Yes, just leave the class public and make the method sealed.
Can we have shared events ?
|Yes, we can have shared event’s note only shared methods can raise shared events.|
Can you write a class without specifying namespace ? which namespace does it belong to by default ?
|Yes, we can, then the class belongs to global namespace which has no name. For commercial products, naturally, we would not want global namespace.|
|7||Can you prevent a class from overriding ?|
Yes.If we define a class as “Sealed” in C# and “NotInheritable” in VB.NET we can notinherit the class any further.
Are private class-level variables inherited ?
|Yes, but they are not accessible. Although they are not visible or accessible via the class interface, they are inherited.|
Can you declare the override method static while the original method is non-static?
No, we can't, the signature of the virtual method must remain the same, only the keyword virtual is changed to keyword override.
Can a constructors that is declared within a base class, inherited by subclasses ?
|No, constructors that are declared within a base class cannot be inherited by sub-classes. If we have not declared any constructor in our class then a default constructor is provided.|