I finished the JPA Basic course on May 11th, and in just 10 days, I finished JPA Programming Part 1!! Doing what I used to do back in school/academy - adding logic to Entity, adding DB save/update logic to service, creating DTOs and sending/receiving data via Controller on the web... doing all that again brought back the memory of "Ah, it was like this". I'll need to review the core parts again while building APIs in Part 2. While reviewing the MVC side again, I also want to take another look at the Data JPA side.