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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AppendixAnswers to Review Questions
Chapter 1: Building Blocks
- D, E. Option E is the canonical
main()method signature. You need to memorize it. Option D is an alternate form with the redundantfinal. Option A is incorrect because themain()method must be public. Options B and F are incorrect because themain()method must have avoidreturn type. Option C is incorrect because themain()method must bestatic. - C, D, E. The
packageandimportstatements are both optional. If both are present, the order must bepackage, thenimport, and thenclass. Option A is incorrect becauseclassis beforepackageandimport. Option B is incorrect becauseimportis beforepackage. Option F is incorrect becauseclassis beforepackage. - A, E.
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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.