actually i want to became an OCPJP so i want some help like how i can register for this ?
should i go for 1.7 or 1.6 version ?
Now that is a little more specific
Again, you can check the differences on respective webpages (at Oracle site). However, below might help you:
1) If you don't have any prior certification (OCPJP/SCJP), then you are not eligible for OCPJP 7. In that case, you can either go for a) OCPJP 6, or b) OCAJP 7 followed by OCPJP 6
2) If you have any prior version of OCPJP/SCJP, then you can go for OCPJP 7 upgrade exam (which consists of only those topics which were added in OCPJP 7).