12Dec/100
What is a good exception?
1. throwing an exception when an invalid parameter is passed to a method. The ArgumentException or one of its derived exception classes should be thrown in this situation.
2. throwing an exception when a call is made to a method that cannot operate because other information must be initialised or other methods must be called beforehand. An InvalidOperationException could be thrown in this case.
6Jan/100
.Net Interview: Method and Property Questions
- What does the keyword “virtual” declare for a method or property?
The method or property can be overridden. - What’s the implicit name of the parameter that gets passed into the set method/property of a class?
Value. The data type of the value parameter is defined by whatever data type the property is declared as. - How is method overriding different from method overloading?
When overriding a method, you change the behavior of the method for the derived class. Overloading a method simply involves having another method with the same name within the class. - What are the different ways a method can be overloaded?
Different parameter data types, different number of parameters, different order of parameters. - If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor?
Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class. - Can you declare an override method to be static if the original method is not static?
No. The signature of the virtual method must remain the same. (Note: Only the keyword virtual is changed to keyword override)
