There are 2 ways to get MCSD: Web Applications Certification:
The 1st one is to pass 3 exams:
- 70-480 or 70-483
The 2nd way is to upgrade MCPD: Web Developer 4 certification or MCPD: Microsoft Azure Developer certification to MCSD: Web Applications certification by passing 70-480 and 70-492 exams.
If you have current MCSD: Web Applications certification not older than 2 years age you can recertify by passing 70-494 exam.
70-492 xam will retire on September 30, 2016.