Anyone has any experience on these exams?

1) Exam 70-511: TS: Windows Applications Development with Microsoft .NET Framework 4
2) Exam 70-515: TS: Web Applications Development with Microsoft .NET Framework 4
3) Exam 70-513: TS: Windows Communication Foundation Development with Microsoft .NET Framework 4
4) Exam 70-516: TS: Accessing Data with Microsoft .NET Framework 4

Thank you.