2016 java9-how-make-qus
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This document provides tips for studying for and taking the Java 9 certification exam, including: - The pros and cons of taking beta exams, such as a lower fee but longer exams with more questions and potential errors. - Key topics to study for the Java 9 exam like Java modules, Process API changes, and the new JShell tool. - Examples of practice questions focusing on tricky aspects of Java 8 streams and constructor references to help test understanding. - A timeline of Java version releases and certification exam dates to understand the certification process.
2016 java9-how-make-qus
- 1. How to Study for Java 9 Certification and Save on Certification Fees slideshare.net/boyarsky Twitter @jeanneboyarsky Blog: http://www.selikoff.net Moderator on forums at: http://www.coderanch.com Jeanne Boyarsky 5/4/16
- 2. Pros of Beta Exams • Only $50 (vs $245) • Get same cert at end • Sometimes clues in one question for another @jeanneboyarsky
- 3. Cons of Beta Exams • Longer exam • More questions • Errors in questions • Don’t get result for many weeks • Lack of study materials @jeanneboyarsky
- 4. How did you do? • Can’t know • Depends which questions chosen • Grading errors on OCP 8 beta @jeanneboyarsky
- 5. Study Plan • List topics to study • Learn them • Identify tricky points • Optional: Make your own questions @jeanneboyarsky
- 6. Example: Java 8 Stream Pipeline What are some tricky points about terminal operators? • Must be exactly one terminal operation • Returns non-stream • No terminal operation means stream not run • Once run terminal operation, stream invalid @jeanneboyarsky
- 7. Writing sample questions • Code • Question • Answers • Change one thing @jeanneboyarsky
- 8. Example: Java 8 Constructor References What are some tricky points about constructor references? • Syntax String::new • Pass when need Supplier • Doesn’t resolve to the type @jeanneboyarsky
- 9. Another sample question • Could we do a fill in the blank question? • What could we alter in the question? • What could be tricky? @jeanneboyarsky
- 10. Cert Timeline Timeline Event Date March 2014 Java 8 Release August 2014 Java 8 OCA Beta April 2015 Java 8 OCP Beta March 2017 Java 9 Release
- 11. What’s in Java 9 • Jigsaw • JShell (Nashorn was originally on OCP beta) • Process API • GC changes • etc @jeanneboyarsky
- 12. Let’s use JShell • Oracle had Nashorn on the OCP 8 beta • JShell is successor • Appears to have same limitations • No up arrow support • No tab autocomplete • Needs more automatic imports @jeanneboyarsky
- 13. Exercise: Reading for details List as many key/tricky points as we can in http://tinyurl.com/javasig-java9shell • http://blog.takipi.com/java-9-early-access-a- hands-on-session-with-jshell-the-java-repl/ • http://openjdk.java.net/jeps/222
- 14. Exercise: Picking important points