Java

What is the application of linked list arrays in the implementation of the HashMap data structure?

Can you list the key features and advantages of PostgreSQL?

How can you ensure safe access and modification of a HashMap in a multithreaded environment?

How can you determine if an incoming message in an application is spam?

What methods can be used to organize a response waiting mechanism in software systems?

What methods can be used to protect your application from unwanted mass activity and spam attacks?

How do you implement the mechanism for obtaining a statement for a user: synchronously or asynchronously?

How to implement sending a PDF document to a user in an application?

What was the composition of the team involved in your last project?

Junior — Middle

СБЕРRedLabСамокат

How is the access order to elements in a LinkedList determined?

Junior — Middle

СБЕРRedLabIT One

How do Stream API differ from loops? Which is faster and why?

How does the @Transactional annotation work in Spring? What is a proxy and when is it created?

Do you have experience developing or supporting web applications?

What is the transactional outbox pattern and why did you implement it?

Is it possible to store PDF files directly inside a PostgreSQL database?

Kafka delivery semantics: exactly once, at least once, at most once. Does Kafka support these semantics from producer to consumer?

Can Redis be fully relied upon as a durable data storage solution?

How to optimize a slow SQL query? What tools to use?

Tell us about ArrayList: features, initial size, insert and delete operations.

What method or format was used to communicate requirements within the team?