Welcome to CodeRanch Nikhil.
Nikhil Nagrale wrote:i)After how many days/months of release of Java 9 will OCAJP 9 certification start?
If Java 9 happens with about the same timeline then you may have to wait a half a year or more after Java 9 is released before you try to become Java 9 certified.
Jeanne wrote this back in August 2017:
Jeanne Boyarsky wrote:Some dates for Java 8:
March 18, 2014 - Java8 released
August 31, 2014 - OCA 8 beta opens
April 28, 2015 - OCP 8 beta opens
https://coderanch.com/t/683060#3205159
Even with Java 9 just around about to be out Java 8 will still be here for a few more years.
I'm pretty sure that Oracle and Pearson Vue are still offering Java 6
testing as noted here:
Just Google for 1Z0-850 pearson vue and it should be one of the first results.
And Java 6 was last updated 2012 according to
https://en.wikipedia.org/wiki/Java_version_history
Before you purchase any material for your OCA prep you may want to check out
https://coderanch.com/wiki/659976/Ocpjp-Wall-Fame
To see what others have used and how they prepared.
This could save you time, money and frustration.