A Comparison Between Spring and Spring Boot
A Comparison Between JPA and JDBC
Synchronization in Java, Part 1: Race conditions, locks, and conditions
Synchronization in Java, Part 2: The synchronized keyword
#Note: recap/re-learn all these stuff > transactional!, spring in da hood, jpa > query ORm, indexing db, stateless vs stateful, tracing: zipkin, n more!!!