Question 21 :
Which control cannot be placed in MDI?
The controls that do not have events.
Question 22 :
What is the difference between proc. sent BY VAL and BY SUB?
BY VAL: changes will not be reflected back to the variable.
By REF: changes will be reflected back to that variable.( same as & symbol in c, c++)
Question 23 :
Does C# support multiple-inheritance?
Question 24 :
Who is a protected class-level variable available to?
It is available to any sub-class (a class inheriting this class).
Question 25 :
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.