I've been studying SCPJ 6 book to take the certification and I'd like to know if it is still worth take this certification.
I'm using this book because I already have it.
As well, I'd to know if there is a huge difference to update from SCPJ 6 to OCPJ 7 or even OCJP 8.
There have been many changes from SCJP 6 to OCPJP 7 and OCPJP8.
1. Count of exams to earn certified Programmer's title- To earn SCJP6, you write only one exam. For OCPJP7 and OCPJP8, the count is 2. Unless you are writing an upgrade exam, you need to write OCAJP 7/ OCAJP8 with the OCPJP7/ OCPJP8.
2. Comparing exam topics Oracle has included multiple advanced prohramming topics in OCPJP 7 and OCPJP 8, which were not included in SCJP 6. The newer exam version includes string processing, concurrency, localization, lambda, streams API, new date time API among others.