I was certified by ESRI as ArcGIS Desktop Developer Associate 10 on 2012. A brief description of this certification is given below and more detailed information please check out ESRI website.
Esri Certified ArcGIS Desktop Developer Associates are familiar with ArcGIS for Desktop and/or engine application development. The candidate is a developer who is sufficiently familiar with ArcGIS technologies to use, configure and set up the software and build desktop GIS applications.
This certification is for ArcGIS Desktop developers who have a good context for ArcGIS Desktop application development through familiarity with ArcGIS end-user tasks such as data analysis, data editing, data creation and data quality, map visualization, and map output.
Michael Yu 