Hi @Tatevik Tatevik ,
You need to pass one (1) of the following elective exams below to earn the MCSD: App Builder certification:
-70-357: Developing Mobile Apps
-70-486: Developing ASP.NET MVC Web Applications
-70-487: Developing Microsoft Azure and Web Services
Also note that Microsoft Certification / Exams is currently not supported in the Q&A forums, the supported products are listed over here https://learn.microsoft.com/en-us/answers/products (more to be added later on).
For further questions I suggest you ask the experts in the dedicated Microsoft Certification / Exams forum over here:
https://trainingsupport.microsoft.com/en-us/mcp/forum/mcp_exams
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Best regards,
Leon