Upgrade exams for VS 2005 are very useful but at the same time also very confusing... Check these equations below and that will help you understand the dynamics of VS 2005 Upgrade exams:
Folks who are MCAD can take 551 and/or 552 upgrade exams... MCADs have an opportunity to choose which of the above upgrade exam to take based on their inclination towards Web Dev or Windows Dev... MCADs also have the liberty to take both 551 & 552 incase they are inclined towards both Web and Windows area... Although, do note that MCADs CANNOT take 553 & 554 as they are meant only for MCSDs... Truthfully, nothing stops MCADs from taking 553 & 554 but unfortunately taking these exams will not yeild into any certification for MCADs unless they later complete their MCSD .Net certification...
Folks who have MCSD .Net have got all the options that MCAD folks have plus have an opportunity take 553 & 554 upgrade exams, which are specifically designed for MCSD .Net folks...