Which of the following can`t be used in our .NET application?

ActiveX control COM type libraries .Net assemblies all of them

What is the default return type of an event?

string double integer no return type of event

Which is the .NET collection class that allows an element to be accessed using a unique key?

Hash table ArrayList SortedList None

int keyword targets to which .Net type?

system.int64 system.int16 System.Int32 system.int18

The .NET Framework provides a runtime environment called..... ?

RCT RC CLR RMT