AP CSA FRQ Guide
2022 FRQ 2: Textbook
Write a complete Textbook class as a subclass of Book. Store the edition in Textbook, call the Book constructor for title and price, override the book-info method, and determine whether one textbook can substitute for another.
Skills Tested
What this FRQ is really practicing
Treat these skills as the study checklist. If any tag feels shaky, review that topic before attempting the full written response.
Starter Approach
How to begin without copying a solution
- 1Write the Textbook class header as a subclass of Book.
- 2Store the edition number in Textbook and call the superclass constructor with title and price.
- 3Return the edition from getEdition.
- 4Override getBookInfo so it includes the superclass book info followed by the edition.
- 5Return true from canSubstituteFor only when titles match and this edition is greater than or equal to the other edition.
Write a first attempt before revealing any solution outline. Most AP CSA FRQ progress comes from tracing your own code and finding the missing case.
Common Mistakes
Mistakes to watch for while writing
Self Check
Review questions before you submit
Defines Textbook as a subclass of Book.
The class header needs extends Book.
Declares an int field for the edition.
Edition information belongs in Textbook.
Includes the constructor with title, price, and edition parameters.
The constructor should receive String, double, and int values.
Calls the Book constructor with title and price.
Use super(bookTitle, bookPrice) as the first constructor statement.
Stores the edition parameter in the edition field.
Assign the int constructor parameter to the Textbook field.
Defines getEdition with int return type.
This method returns the stored edition number.
Overrides getBookInfo with String return type.
Use the same method signature as Book.
Uses super.getBookInfo when building textbook info.
The title and price should stay managed by Book.
Practice Links