How many times and when the preamble has been amended so far?

Q What is the use of volatile keyword in c++? give an example.
Q Which fictional character do you wish was real?
Q Which British golfer won the 1969 British Open and 1970 US Open Championships?
Q What is Calciferol?
Q Which control you cannot put it into the MDI parent control in Windows Forms?
Q The main subclass of the Exception class is _______ class.
Q If a wife had expressed distaste for it previously, would her husband's habit of putting marmalade in his egg at breakfast be grounds for divorce?
Q Can a constructor call another constructor?
Q What is the cli? is it the same as the clr?
Q Which Saints day is 1st March
Q Burkina Faso, which is in news for terrorists attacks, is located in which part of the World?