Question 16 :
Can multiple catch blocks be executed for a single try statement?
No. Once the proper catch block processed, control is transferred to the finally block (if there are any).
Question 17 :
Explain the three services model commonly know as a three-tier application.
Presentation (UI), Business (logic and underlying code) and Data (from storage or other sources).
Question 18 :
What is the syntax to inherit from a class in C#?
Place a colon and then the name of the base class.
class MyNewClass : MyBaseClass
Question 19 :
Can you prevent your class from being inherited by another class?
Yes. The keyword "sealed" will prevent the class from being inherited.
Question 20 :
Can you allow a class to be inherited, but prevent the method from being over-ridden?
Yes. Just leave the class public and make the method sealed.