Java

How does Kafka ensure long-term message storage?

Middle — Middle+

РЖД

Explain the concept of double-checked locking and how it is used to improve multithreading efficiency.

Which annotation indicates that beans are managed by the container?

In which cases is it necessary to override the service() method?

What are the advantages of servlet technology compared to CGI (Common Gateway Interface)?

What is the role of the View component in MVC architecture?

How to avoid mandatory handling of IOException exception?

How does the HAVING operator work in SQL and what is it used for in queries?

When exactly does the garbage collector trigger the memory release process in the heap?

Have you created your own module or starter project based on Spring Boot?

Junior — Middle

Альфа-Банк

Describe the main stages and sequence of actions in the project development process

How is the placement of leaf nodes organized in a red-black tree?

How to organize parallel computations and thread management in large-scale enterprise software?.

What tasks have you solved using Spring?

What is the keyword 'final'?

How can you determine the amount of memory consumed by a Java application launched from a *.jar file using the command java -jar, in case of a 'No heap space' error?

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

Why is the HttpServlet class declared abstract?

Can you list different generations of garbage collectors and explain their features?

What is the main function of the Kubernetes container orchestration system?