Roselyn Teukolsky - AP Computer Science a Premium, 2022-2023

Many people helped in the creation of this book.

I would like to thank my incredible editor, Samantha Karasik, for her expertise and assurance in taking the reins of the project. Thanks also to Megan Buckman, Christine Ricketts, Jeff Batzli, Alison Maresca, Jalisa Valladares, Mandy Luk, and all the other members of the Kaplan staff who worked on the production of the book and online tests.

I am most grateful to my former editors, Linda Turner and Annie Bernberg, for their friendly guidance and moral support over the years.

A very special thank you to Sage Miller for her careful reading of the manuscript and her valuable suggestions. Thanks also to Judy Hromcik and Richard Kick for their contributions over the years.

My husband, Saul, continues to be my partner in this projecttypesetting the manuscript, producing the figures, and giving advice and moral support.

Thank you to the computer science teachers who taught AP Computer Science during the pandemic under very difficult circumstances. This book is dedicated to you.

Copyright 2022, 2020, 2018, 2015, 2013, 2010 by Kaplan, Inc., d/b/a Barrons Educational Series

Previous editions Copyright 2007 under the title AP Computer Science Levels A and AB, 2003 under the title How to Prepare for the AP Computer Science Advanced Placement Examination, JAVA Version, and 2001 under the title How to Prepare for the AP Computer Science Advanced Placement Examination by Kaplan, Inc., d/b/a Barrons Educational Series.

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Roselyn Teukolsky has an M.S. degree from Cornell University, and has been teaching programming and computer science since 1980. She has published articles in The Mathematics Teacher and in the National Council of Teachers of Mathematics Yearbook, and is the author of Barrons ACT Math and Science Workbook and co-author of Barrons SAT 1600: Aiming for the Perfect Score. The awards she has received include the Edyth May Sliffe Award for Distinguished Mathematics Teaching and the Alfred Kalfus Distinguished Coach Award from the New York State Math League (NYSML). For several years, Ms. Teukolsky served as a Reader for AP Computer Science.

Ms. Teukolsky started teaching AP Computer Science when the programming language was Pascal, the first language used for the exam. By the time she wrote this book (in 1997), software development was moving toward object-oriented programming and the language of the AP exam had switched to C++. In 2004 the language of the exam changed yet again, to Java. For more than 20 years, Ms. Teukolsky has kept this bookin its many incarnationsup to date.

The introduction to this book provides an overview of the format and content of the AP Computer Science A exam.

The full-length practice test at the start of this book serves as a diagnostic test. It is accompanied by a diagnostic chart that identifies the topic related to each multiple-choice question and the page in the review chapters that discusses that topic. Detailed answer explanations are provided for all multiple-choice questions, and complete solutions and scoring rubrics are supplied for the free-response questions. You can also use this test as a practice test once you have completed your review.

features tips and advice for tackling the multiple-choice and free-response questions on the exam.

each contain a comprehensive review of a topic, multiple-choice practice questions that test your understanding of that topic, and detailed answer explanations for all questions. These questions are designed to help you review parts of the Java subset you should know for test day. A few questions are not typical AP exam questionsfor example, questions that test low-level details of syntax. Most of these practice questions, however, and all the multiple-choice questions in the diagnostic and practice tests are representative of actual exam questions. Note that several groups of these practice questions are preceded by a single piece of code to which the questions refer. Be aware that the AP exam will usually restrict the number of questions per code example to two.

In both the text and questions/explanations, a special code font is used for parts of the text that are Java code.

//This is an example of code font

A different font is used for pseudocode.

< Here is pseudocode font. >

All features of Java that are likely to be tested on the AP exam are covered in this book, including arrays, two-dimensional arrays, strings, list processing, and inheritance in object-oriented programming. A small number of optional topics that are not part of the AP Java subset are included because they are useful for the free-response questions. Sections in the review text and multiple-choice questions that are optional topics are clearly marked as such.

This book concludes with two full-length practice tests that mirror the actual exam in format and content. Each test is followed by an answer key and detailed explanations for the multiple-choice questions and complete solutions and scoring rubrics for the free-response questions.

Once you complete a test, you may wish to calculate your approximate AP score. Use the scoring worksheet provided on the back of the answer sheet.

There are three additional full-length practice tests online. You may take these tests in practice (untimed) mode or in timed mode. All multiple-choice questions are accompanied by detailed answer explanations, and there are complete solutions and scoring rubrics for the free-response questions.

This book is designed to prepare you for the AP Computer Science A exam. It would typically be used upon completion of an AP course. However, since it contains a complete summary of all exam topics, you can use it for self-study throughout the school year, along with a suitable textbook. You can also use this book as a supplement to a first-semester college course where Java is the programming language.