Mostly, they ask you about concepts of Java programming, like how to protect a set of transactions that need to happen together and fail gracefully otherwise (no incomplete operation). They also ask you about your implementation, why not this or that alternative, etc.
How to investigate the OutOfMemory reason on a production instance? What are you going to do to prevent the problem in future? What approaches do you know to tune GC and JVM in terms of memory management?
Describe how you should write thread-safe singleton with lazy initialization.
SQL joins
1 algorithmic question (which can be medium difficulty Level on Leetcode) Loads of questions about Core Java, clean code writing and Spring Core.
Generally the 'Top interview questions for Java', they have standard questions and rarely go beyond that, not much thinking or algorithms. Technical clients did expand the questions for instance more with css/js etc. or you DID NOT here the same question for the n-th time [like in my investment banking case] In investment banking the Luxoft teams were really focused on TDD,clean code (or later on DDD) so basically so then you have to exagerate and say hwo Clean Code change your life, and how you start writing a program with thinking about test first.
What does ACID acronym stands for and how does RDBMS and your code help to achieve its properties?
Find nth largest/smallest number in an array
Hibernate (All concepts in detail)
Monto del salario esperado en pesos mexicanos
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