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Passed 1Z0-813 - Upgrade to Java SE 8 OCP ( Java SE 6 and all prior versions) with 95%  RSS feed

 
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Wasn't expecting to get this high a score so I'm chuffed! Here is a brain dump of all I can remember from the exam:

Streams/Lambdas:  understand the various overloaded reduce methods, flatMap(), findAny/First(), all/any/noneMatch(), primitive streams, collectors, parallel streams, identifying valid usages of Functional Interfaces defined in java.util.function, Optional, Method References, difference between intermediate & terminal operations, valid lambdas
Concurrency: concurrent collections, Callable, Future, CyclicBarrier(about 3 questions), ForkJoinPool (understand how to implement the compute() method for both RecursiveTask & RecursiveAction and the different between the two)
Try-With-Resources: Suppressed Exceptions, understanding that Closeable extends AutoCloseable
Multi-Catch Exceptions:  question on identifying that caught exception is final
Date/Time: DST calculation, Instant, LocalDateTIme, ZonedDateTime, ZoneId, Formatting
Localisation: Resource Bundles, understanding the concepts of localisation
Switch with strings: valid usages
NIO.2:  valid WatchKey states, Path methods, Files.walk, Files.find, File Attributes
Misc: Understanding that Iterable interface provides a default forEach implementation, Map.compute(), Generics diamond operator

I started studying about 6 months ago. Here is the approach I used:

• Try do some study and coding every day if even for a few minutes
• Read 2 books, probably 3 times over and revised the chapter summaries countless times:
o    Boyarsky & Selikoff
o    Ganesh, Kiran & Sharma
• Enthuware exam simulation software: really filled in any gaps on the finer details and was absolutely essential
• A great exam tip from one of the books which helped me was to first identify if any of the answers are “will not compile” or ”throws exception at runtime”.  When neither were present it changed the way I analysed the code to a more relaxed manner

Hope the above help and good luck!
Keith


 
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Congratulations Keith and thanks for sharing your story and for achieving this you get a cow

When you get a few moments please add your story to the OCP Wall Of Fame https://coderanch.com/wiki/659976/OCPJP-Wall-Fame.
 
Keith Carroll
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Pete Letkeman wrote:Congratulations Keith and thanks for sharing your story and for achieving this you get a cow

When you get a few moments please add your story to the OCP Wall Of Fame https://coderanch.com/wiki/659976/OCPJP-Wall-Fame.



Done
 
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Congrats Keith; that's great!
 
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Way to go Keith!! Nice work!
 
It is sorta covered in the JavaRanch Style Guide.
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