Are there any question papers available for MCSD Web applications? Especially for "Developing ASP.NET 4.5 MVC Web Applications" and "Developing Windows Azure and Web Services"?
I don't know of any practice exams (at least, none that are legitimate) available at this time. For both of these, the Exam Reference book is available from Microsoft Press. Apart from that, you might look at the other information provided on the exam pages:
EDIT: Note that these exams will updated to cover Visual Studio 2013, MVC5, EF6, etc. starting April 30th. If you have not been using these, you need to start before taking these exams.
Christopher Reed, MCT, MCSD, MCPD, MSpec, MTA, MCTS "The oxen are slow, but the earth is patient."