.NET Constants, Enum, Arrays & collection - Interview questions

DOT.NET - Arrays treat several items as a single collection.....
Constants are values which are known at compile time and do not change.....
There are various collection types in .NET which are used for manipulation of data. Collections are available in System.Collections namespace.....
The Array class is not part of the System.Collections namespaces. But an array is a collection, as it is based on the IList interface......
There are two types of multidimensional arrays: Rectangular arrays, Jagged arrays....