The updated cheat sheet includes:

• Mutable / Immutable Objects

• Reference Trap (updated)

• Wrapper class

• Array vs. ArrayList

• Exceptions

https://www.learnthepart.com/course/2dfda34d-6bbc-4bd5-8f45-d5999de2f514/3a5da401-2fbc-46ab-b582-e5b47e3c9ecb