On the first interview session there were average Java questions, focused on multithreading and collections (How does HashMap work?). The assessment consisted on 2 problems, one was focused on efficiency, the other was focused on logic. On the last round, the technical interview was more complex, addressing subjects like Java memory.
what Spring boot Annotations you have used
What are the advantages and disadvantages of using ORM like Hibernate?
Why do you want to work at Coolblue?
Stream api oops concept microservices
Explain oops concepts? What is static? What is multithreading? Custom exception syntax, Collection hierarchy, Mist important internal working of Hashmap? (refer to javatpoint) Sql queris simple,
how to write lambda expressions and what are the major changes in java-8 w.r.t previous versions.
Basic iOS question. MVC,MVVM, optional chaining.Delegates and protocols, Notification, Coredata ,weak vs strong variable, GCD, oops concepts, threading.
All the questions asked were from https://medium.com/@s.sreejith/core-java-interview-cheat-sheet-dce4f2590f4f
Several questions about Operating Systems, Networking and Programming Languages.
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