A single USB port can have a maximum of _____ hubs attached

Explain briefly the operation of each of the following methods and properties of interface IDictionary, which both Dictionary and Sorted- Dictionary implement:

a) Add b) Keys c) Values d) ContainsKey

Which syntax imports all static members of class Math?

a. import java.lang.Math.*. b. import static java.lang.Math.*. c. import static java.lang.Math. d. None of the above.