Download e-book for kindle: AP Computer Science: Levels A and AB by Roselyn Teukolsky, M.S.

By Roselyn Teukolsky, M.S.

ISBN-10: 0764192523

ISBN-13: 9780764192524

The recent fourth variation of Barron’s complicated Placement machine technological know-how try out guidance handbook has been up-to-date with a brand new case research. This new GridWorld Case learn might be demonstrated at the AP examination beginning in might 2008. The guide offers 4 full-length AP perform assessments, each one for degrees A and AB. of those assessments are awarded as diagnostic checks, with charts detailing the themes for every query. All 4 version checks have questions replied and defined. potential try out takers also will locate an in depth topic evaluate, beginning with a assessment of Java 5.0 and occurring to hide all subject matters puzzled in either the extent A and point AB checks. There are new sections on garage of numbers and random numbers. The handbook can be bought by myself, or with an not obligatory CD-ROM, with its extra full-length version AP checks, one point A and the opposite point AB, see Barron’s ISBN 0-7641-9350-3.
*The CD-ROM isn't really incorporated with the electronic model of this e-book.

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Extra resources for AP Computer Science: Levels A and AB

Example text

25. Refer to the following class, containing the mystery method. public class SomeClass { private int[] arr; //Constructor. Initializes arr to contain nonnegative // integers k such that 0 <= k <= 9. length; i++) value = value * 10 + arr[i]; return value; } } Which best describes what the mystery method does? (A) It sums the elements of arr. length-1]. (C) It builds an integer of the form d1 d2 d3 . . dn , where d1 = arr[0], d2 = arr[1], . . length-1]. (D) It builds an integer of the form d1 d2 d3 .

2. Place at location i the object at j. 3. Place temp at location j. This has the effect of swapping the objects at i and j. Notice that choices B and C, while incomplete, are not incorrect. The question, however, asks for the best description of the postcondition, which is found in choice E. 18. 5 from a negative real number and then truncating it produces the number correctly rounded to the nearest integer. Note that casting to an int truncates a real number. The expression in choice B is correct for rounding a positive real number.

The largest base-10 number that can be represented with 8 bits is 28 − 1 = 255. 13. (B) The index range for ArrayList is 0 ≤ index ≤ size()-1. Thus, for methods get, remove, and set, the last in-bounds index is size()-1. size(). 14. (E) Subclasses of Quadrilateral may also be abstract, in which case they will inherit perimeter and/or area as abstract methods. 15. (C) Segment I starts correctly but fails to initialize the additional private variables of the Rectangle class. Segment II is wrong because by using super with topLeft and botRight, it implies that these values are used in the Quadrilateral superclass.

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AP Computer Science: Levels A and AB by Roselyn Teukolsky, M.S.

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