Book Image

Oracle Certified Associate, Java SE 7 Programmer Study Guide

By : Richard M. Reese
Book Image

Oracle Certified Associate, Java SE 7 Programmer Study Guide

By: Richard M. Reese

Overview of this book

<p>Java SE 7 Associate Programmer certification adds to your qualification as a Java developer. Knowledge of Java is important, but knowing how to write an efficient and productive code adds to your skills and gives you an edge when you are planning to give the certification exam. Coverage of the objectives goes beyond a simple review of certification objectives.</p> <p>"Oracle Certified Associate, Java SE 7 Programmer Study Guide" addresses certification exam objectives and provides discussion and examples to show the best ways of applying Java language features in real world programming. You will gain in-depth understanding of Java by examining how objects are allocated in the heap and how methods are managed in the program stack.<br /><br />"Oracle Certified Associate, Java SE 7 Programmer Study Guide" covers all of the Java SE 7 Associate Programmer certification objectives. It starts with a high level overview of an application’s structure to provide a framework for subsequent chapters. Chapters are organized around common themes with emphasis on memory usage. You will get an in-depth and complete understanding of the run-time Java environment using the illustrations that show the impact of class and method usage on the program stack and heap. <br /><br />Augmenting the coverage of certification objectives are examples of how you can use the classes, methods, and techniques in a productive and sound manner. In addition, sample exam questions are given in each chapter.</p>
Table of Contents (16 chapters)
Oracle Certified Associate, Java SE 7 Programmer Study Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Chapter 2: Java Data Types and Their Usage


Question No.

Answer

Explanation

1

c

You cannot access an instance variable from a static method.

2

c and e

Option a is incorrect because single quotes are used for character data. Option b requires a suffix of f as in 3.14159f. A byte accepts only the values from -128 to +127.

3

b and d

Option a is incorrect because instance variables need to be used with an object. Option c is incorrect because instance variables cannot be used with a classname.

4

a, b, and d

There is no StringBuilder toInteger method.

5

b

The lastIndexOf method takes a single argument of char. The charAt method returns the letter at the position. The last use of indexOf does not take both a string and a char argument.

6

c

Option a only compares equality of objects. Option b is incorrect because there is no such method as matchCase In option d, the equals method uses the case which is different in the two strings.