Java

Explain the purpose and features of using the volatile keyword in programming.

Junior — Middle

FirecodeIT OneOZON+10

What does the hashCode method return in Java?

What is the base class that serves as the ancestor for all other classes in object-oriented programming?

Can the implementation of a static method in a subclass be changed by overriding it?

What happens to a method annotated with @PreDestroy if it belongs to a prototype bean in Spring?

How do garbage collector mechanisms determine which object should be freed from memory?

Can you explain why the @Transactional annotation is used in Java application development?

Can the implementation of the Singleton pattern be considered safe from a multithreading perspective?

Can you name two main types of operations implemented using Stream API?

What are the main principles and recommendations when implementing the hashCode method for your classes?

Junior — Middle

ylabВТБ

What distinguishes Spring Boot from the core Spring platform, and what are their functional differences?

Junior — Middle

AstonIT OneНорд Клан+2

Can you explain what Hibernate is and how it is used in Java application development?

Junior — Middle

Y_lab developmentайтекоAston+6

Can you name the main architectural principles underlying the Spring Framework?

What mechanisms control memory release in the system?

Will the data stream execute without starting the terminal operation?

Is it allowed to use null as a key in a hash table HashMap?

What types of scope exist for components or beans in dependency injection?

Junior — Middle

СБЕРylab

Which level of transaction isolation provides the highest degree of protection against conflicts?

In what situations is it preferable to use solutions based on NoSQL databases?

Can you explain what non-relational databases are and how they differ from traditional relational systems?