Appendix A
Answers to Self Tests
Chapter 1: Java Fundamentals
1. What is bytecode and why is it important to Java’s use for Internet programming?
Bytecode is a highly optimized set of instructions that is executed by the Java Virtual Machine.
Bytecode helps Java achieve both portability and security.
2. What are the three main principles of object-oriented programming?
Encapsulation, polymorphism, and inheritance.
3. Where do Java programs begin execution?
Java programs begin execution at main( ).
4. What is a variable?
A variable is a named memory location. The contents of a variable can be changed during the execution of a program. ...
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