#1.Gün - Variables, If-Else, Arrays, Loop, Value and Referance Type

 #2.Gün - Object Oriented Programming

 #3.Gün - Encapsulation, Inheritance

 #4.Gün - Interface

 #5.Gün - N-tier Layer

 #6.Gün - Spring Boot

 #7.Gün - Swagger

 #8.Gün - One to Many Relationship, Sorted and Pagination

 #9.Gün - Data Transfer Object (Dto) and Validation