March 2023
Intermediate to advanced
1851 pages
66h 25m
English
book
OCP Oracle Certified Professional Java SE 17 Developer (Exam 1Z0-829) Programmer's Guide
by Khalid A. Mughal, Vasily A. Strelnikov
Content preview from OCP Oracle Certified Professional Java SE 17 Developer (Exam 1Z0-829) Programmer's Guide
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Appendix D
Annotated Answers to Review Questions
1 Basics of Java Programming
1.1 (c)
A method is an operation defining a particular behavior of an abstraction. Java implements abstractions using classes that have properties and behaviors. Behaviors are defined by the operations of the abstraction.
1.2 (b)
An object is an instance of a class. Objects are created from classes that implement abstractions. The objects that are created are concrete realizations of those abstractions. An object is neither a reference nor a variable.
1.3 (b)
(2) is the first line of a constructor declaration. A constructor in Java is declared like a method that does not return a value. It has the same name as the class name, but it does not specify a return type ...
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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.
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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.