I am preparing for 1z0-813 and wanted to know which study materials as of now will be useful.
I have the following in mind,
1) Java 8 Lambdas
2) Java 8 in Action
3) Enthuware Simulator for the exam
That said, i saw that there are some other books as well which can be used for this exam. I need to buy the one suitable for the upgrade exam.
These are as follows,
1) OCA/OCP Java SE 7 Programmer I & II Study Guide by Kathy and Bert
2) OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide: Exam 1Z0-808 By Jeanne
3) OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide: Exam 1Z0-809 By Jeanne
I had referred the Kathy Sierrra book for OCPJP 6 and most likely the new one is the same with updates for Java 7.
That said please suggest me which ones of the above mentioned 3 should i go for as per your experience with them.
Any other resources will also be highly appreciated
There's actually a number of objectives you need to know for the 1Z0-813 upgrade exam that you do not need to know for the regular exam, such as the Lock classes, NIO.2 DirectoryStream, FileVisitor, etc. Jeanne and I included an extra 55-page appendix in our Sybex OCP book, just to cover those topics for the upgrade exam.
I recommend you at least skim the OCA 8 material, in part because some questions from the regular exam may slip into the upgrade exam. A large chunk should be review, although you will need to know some of the new syntax... such as symbols in literal expressions, enums in switch statements, default interface methods, etc.
That said, your best single resource is probably the OCP 8 book, since it includes OCP 8 regular and upgrade exam objectives. Kathy and Bert's book may help you with some questions, but since the new exam relies heavily on streams, and streams weren't added until Java 8, it would not be a one-stop resource.