1. Which of the following is logical extension in which CPU switches jobs
so frequently that users can interact with each job while it is running,
creating interactive computing?
(a)Caching (b)Kernel mode (c)Clustering (d)Rendering (e)Timesharing
2.To implement a polymorphism, what king of member function is needed to be
designed in the base class for dynamic binding to take effect?
(a)utility function (b)boolean function (c)default constructor
(d)access function (e)virtual function
3.What kinds of constructor will be invoked when an object served as a
"pass by value" parameter?
(a)default constructor (b)conversion constructor (c)virtual constructor
(d)copy constructor (e)derived constructor
这是小的最近写考古题所遇到的困难，请好心的版友能够帮个忙