Pytania Java
This is a pretty good article about core Java interview questions.
https://www.simplilearn.com/tutorials/java-tutorial/java-interview-questions
Bredo
This is a pretty good article about core Java interview questions.
https://www.simplilearn.com/tutorials/java-tutorial/java-interview-questionswhat is the difference between interface and abstract class?
OOP principles?
What are access modifiers?