I'm studying for exams 1Z0-803 & 1Z0-804, but is still valid to 1z0-850 certification?
Your are mixing the exam entity with the certification entity .... and that tends to lead to confusion.
1z0-850 is an exam not a certification. ( you could say you meant the certification associated with 1z0-850 ... ( Java 5 SE OCA ) ).
Without going into more complexity than I have time for ... probably best to continue with your Java 7 SE OCA/OCP.
If you follow through the certification and exam links at at http://certification.oracle.com who should be able to see more .... but be aware the Java 7 SE OCA/OCP is more to oracle standard than the Java 5/6 SE ( I think I read you could go direct to OCP on those in one exam ..... but I'd have to double check and I dont have time).
Edited by: bigdelboy on 26-Mar-2013 21:09 The1z0-850 exam and associated certification is not currently marked for retirement as far as I know; that situation could change soon for all I know.