Queries regarding microsoft 70-486 exam

Hi,

I would like to do a developer certification in microsoft .net. I have choosed microsoft 70-486(Developing ASP.NET MVC Web Applications) exam. So i am having following queries. Please provide your suggestion.

Queries:
1. Microsoft 70-486(Developing ASP.NET MVC Web Applications) exam is still active or retired?
2. Is there any prerequisites certification or exam should be done before doing this Microsoft 70-486(Developing ASP.NET MVC Web Applications) exam?
3. Expiration period after passing this Microsoft 70-486(Developing ASP.NET MVC Web Applications) exam?

Thanks
S. Rajkumar