This is simple test task by Deltix Inc (c). www.deltixlab.com
Please choose one of the available languages C / C++ / C# / Java and implement DiffProcessor.Processor class (object). Be aware that class will be tested on private test data which is not part of this package. Test projects was created using Visual Studio 2013 and Intellij Idea, but you can use whatever IDE and OS you want. Place your solution on GitHub (in separate project).