Java

Can you name and explain the types of Proxy used in Spring Framework?

What is the internal data structure of the HashMap bucket used for storing elements?

Have you used the Version property in Hibernate for version control when creating objects?

Have you configured the second-level cache mechanism in Hibernate?

Explain the concept of Bucket within the HashMap data structure.

What reasons can cause a database index not to be used for query execution?

Have you ever encountered situations where you changed the transaction isolation level in your projects?

Junior — Middle

Brainway LTDУралсиб

How is data safety ensured in the system when using the Durability property in the ACID transaction model?

Can you explain what a key in the Kafka system is and what role it plays?

Can you explain the concept of D (Durability) in the ACID principle and its role in ensuring transaction reliability?

Can you explain what a non-clustered index is in a database management system?

Why do insert or search operations in HashMap perform in constant time when there are no collisions?

Explain the principle of operation of clustered indexes in database management systems.

What mechanisms ensure message order preservation in Kafka?

What are the advantages and disadvantages of Kafka message queue system?

Junior — Middle

FirecodeМеталлИнвестБанкСовкомбанк+4

What is the role of the second-level cache in Hibernate and why is it used?

What approaches can be used to optimize high-load SELECT queries in a database to reduce CPU load?

Have you had experience applying optimistic locking mechanisms in databases or synchronization systems?

Can you explain the purpose of using the SKIP LOCKED option when working with SQL queries?

Why is it important to set the transaction isolation level, and how does it affect the system's operation?