Java-interview-questions Main Link Java Junior Questions OOP first Java Core firsh second third fourth Java Collections Framework first second third Serialization firsh Multithreading first second Java I/O first second JSP/Servlets/JSTL firsh second third fourth REST API first Transaction Transaction ACID Pattrens first JDBC first JPA first second ORM, Hibernate first second Spring Framework first second third IoC, DI, IoC-container first