Java

Will the method annotated with @PostConstruct be called on a Spring Bean configured with prototype Scope?

Is a linked list in a HashMap's Bucket always linked?

What is the purpose of the flatMap method in the Stream API for data processing?

How have you implemented caching of data received from third-party APIs or services?

What characteristic should a key have to be used in a HashMap?

Junior — Middle

IT OneAstonSecreate+3

How is the performance of insert, search, and delete operations in HashMap evaluated?

What types of indexes have you used or recommend for optimizing database queries?

What approaches did you use to eliminate the N+1 query problem in Hibernate and how did you implement it?

In what cases can the method with the @PreDestroy annotation in Spring not be called for a Bean?

What types of implemented Map interfaces are you familiar with and have used in projects?

Will the method annotated with @PreDestroy be called for a Prototype scope bean in Spring upon its termination?

How is the application context created and initialized in Spring Framework?

How is the HashMap data structure implemented and how does it ensure quick access to elements?

Junior — Middle

StrokiСБЕРRed Collar+6

Can you explain the principle of the Repeatable Read isolation level in PostgreSQL transactions?

How does using atomic operations help avoid race conditions in a multithreaded environment?

How do you plan and track task deadlines?

What is the difference between Singleton and Prototype scopes in the Spring Framework?

When and why should the combination of the keywords synchronized and volatile be used in Java to ensure thread safety?

Explain the main differences between race condition and data race.

What methods have you used to improve the efficiency of database interactions in your projects?