Java

How is the efficiency of element search within a hierarchical tree structure evaluated?

Have you had experience managing and configuring databases in your practice?

How is the HashSet data structure implemented and what principles does it use to store elements?

Which modules or components of the Spring infrastructure have you used in your projects?

How is the efficiency of searching for an element by key in a HashMap structure evaluated?

Can you explain what a marker interface is and why it is needed in programming?

What is your experience with optimizing garbage collector performance in applications?

Can you name data types that cannot be changed after creation?

What is your experience in optimizing and tuning JVM parameters to improve application performance?

What types of indexes are available in PostgreSQL for data search optimization?

Share your experience using Spring Security in projects.

Junior — Middle

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What version of Java was used in your project or work?

Junior — Middle

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Explain the concept of the string pool in Java and its purpose.

Junior — Middle

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Can you explain what is meant by a hash function and how it works?

What experience do you have with automatic memory management mechanisms and garbage collection in applications?

How did you analyze incoming requests?