Backend Java Developer Interview Questions

320 backend java developer interview questions shared by candidates

Questions related to REST APIs like the technical differences between different HTTP methods. DBMS concepts like Indexing, Types of Keys, Joins, Deadlock, etc. Java questions related to OOPs, String, exception handling, multithreading, etc. Some questions related to Docker were also asked.
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Java Backend Developer

Interviewed at financial.com

4.3
Jul 20, 2023

Questions related to REST APIs like the technical differences between different HTTP methods. DBMS concepts like Indexing, Types of Keys, Joins, Deadlock, etc. Java questions related to OOPs, String, exception handling, multithreading, etc. Some questions related to Docker were also asked.

Q: Overloading vs overriding? Q: Array vs ArrayList? Q: Hashset vs Hashmap? Q: Final, finalize, finally? Q: try-catch-finally? Q: Comparable vs comparator? Q: @PathParam vs @QueryParam? Q: How to pass header into method parameter of a GET endpoing? Q: API flow of custom exception handling? Q: How to write a GET endpoint? Q: What happens if user uses POST request for a GET endpoint?
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Java Backend Developer ()

Interviewed at Symphony Talent

3.2
Jul 18, 2021

Q: Overloading vs overriding? Q: Array vs ArrayList? Q: Hashset vs Hashmap? Q: Final, finalize, finally? Q: try-catch-finally? Q: Comparable vs comparator? Q: @PathParam vs @QueryParam? Q: How to pass header into method parameter of a GET endpoing? Q: API flow of custom exception handling? Q: How to write a GET endpoint? Q: What happens if user uses POST request for a GET endpoint?

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