November 2024
Intermediate to advanced
1040 pages
25h 29m
English
book
OCP Oracle Certified Professional Java SE 21 Developer Study Guide
by Jeanne Boyarsky, Scott Selikoff
Content preview from OCP Oracle Certified Professional Java SE 21 Developer Study Guide
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Assessment Test
Use the following assessment test to gauge your current level of skill in Java for the 1Z0-830. This test is designed to highlight some topics for your strengths and weaknesses so that you know which chapters you might want to read multiple times. Even if you do well on the assessment test, you should still read the book from cover to cover, as the real exam questions are quite challenging.
- What is the result of executing the following code snippet?
41: final int score1 = 8, score2 = 3;42: Integer myScore = 7;43: var goal = switch (myScore) {44: case score1, score2, 7 -> "good";45: case Integer i when i < 10 -> "better";46: case Integer i when i >= 10 -> "best";47: default -> { yield "unknown";}48: case null -> "nope"; ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.