Xamarin is clearly focusing on cross platform, and as part of that, and as evidence of it as well, they have phased out their iOS and Android certification and now only offer the bigger certification for Mobile Development. So I took that (3 hour) test 
About Jesse Liberty
Jesse Liberty has three decades of experience writing and delivering software projects and is the author of 2 dozen books and a couple dozen Pluralsight & LinkedIn Learning courses. He was a Senior Technical Evangelist for Microsoft, a Distinguished Software Engineer for AT&T, a VP for Information Services for Citibank and a Software Architect for PBS. He is a Xamarin Certified Mobile Developer and a Xamarin MVP and a Microsoft MVP.
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