The exam is a cumulative exam that covers the entire course from the summer assignment until Unit 10 of the College Board's Course and Exam Description (CED),
It is a good idea to review the questions and the other Labs we have done throughout the year. There will be 60 minutes to answer 24 multiple choice questions, and 20 minutes to answer 1 free response question. (the exam category is worth 20% of your grade, and is the last chance to do better than your Qtr 3 Exam in this category).
A good way to review the multiple choice is reviewing Questions from previous Progress checks at AP Classroom, and previous Chapter Tests (this year they were returned by e-mail) or Chapter 13 of Java2020-SFHS
A good way to review the free response questions is past AP Questions @mathorama like we have been doing in class and homework, or Chapter 14-15 of Java2020-SFHS. Don't forget that you don't need a computer to practice writing code at javabat.com.
Yet another good way to review the multiple choice is https://codingbat.com/java. To review the free response, be sure to consult the Chapter 2 Study Guide and the Chapter 3 Study Guide. Don't forget that you don't need a computer to practice writing code at javabat.com. The free response will emphasize writing methods that deal with int, double, and String and arrays of int, double, and String that might need a loop, as well as making classes and implementing interfaces. Practice writing loops, methods, and class declarations like the ones mentioned on the Chapter 2 Study Guide, Semester 1 Study Guide and javabat exercises.
Some elegant solutions to these are at Skylit, the book publisher of our textbook. Good Luck!