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Scored 91% on OCP Java SE 8 Programmer Exam 1Z0-813 (Upgrade from SE 6)

 
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Preparation tips:

1. Read OCP Oracle Certified Professional Java SE 8 Programmer II Study Guide Exam 1Z0-809 by Boyarsky and Selikoff
-> Though the book is for 1Z0-809 it do cover all topics from 1Z0-813.

2. Used Enthuware mock exam for 1Z0-813
-> I've used Enthuware simulator for this cert and was really satisfied with it. In my opinion it's one of the best simulator if not the best simulator for Java certs.

Note:
-> One thing I remember that really caught me off guard is the return type of IntStream.average() and IntStream.sum(). The average() method returns OptionalInt while the sum() method returns primitive int. I thought they both return primitives with 0 as the default value when the stream has no elements to process.
-> Other than that the questions were pretty much what were in the simulator so I'm almost never surprised by a question.

Good luck to those who are planning to take the exam.
 
Enthuware Software Support
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Congratulations, Max! Great score!!
Glad to know that our product was helpful in your preparation.

Thanks a lot for your feedback about average/sum methods. We have incorporated questions on them in our recent update of the question banks.

regards,
Paul.
 
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Congratulations Max!  I'm preparing for the same exam and using the same material.  I'm glad to see that it helped so much.
 
Greenhorn
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Congratulations! You got the same score as me :p

max ramos wrote:Preparation tips:
Note:
-> One thing I remember that really caught me off guard is the return type of IntStream.average() and IntStream.sum(). The average() method returns OptionalInt while the sum() method returns primitive int. I thought they both return primitives with 0 as the default value



IntStream.average() returns OptionalDouble.
It's not so strange when you think about it. The sum of no values is '0'. However there is no average of no values.
The sum is a reduction with an identity value, while average has no identity value.
 
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