Java

What protocol underlies WebSocket technology for establishing a persistent connection between client and server?

Junior — Middle

Билайн

How does a declared private constructor behave when creating an instance of a class?

Why and how to override the hashCode method?

Have you applied the waterfall methodology in your projects?

Can there be two identical values for a foreign key referencing the same table in a database?

Can you describe an example of a complex task you faced at your previous job?

What is the main purpose of using stored procedures in a database?

How to determine the number of transactions when calling a method annotated with @Transactional from another method with the same annotation in a different class in Spring?

Junior — Middle

Северсталь-Ифоком

Какими способами вы подключаете внешние зависимости при написании тестов?

How can the correctness and performance of a database be checked?

What is the difference between ArrayList and the List interface in Java, and how are they related?

Junior — Middle

СБЕР

What are the consequences of a memory leak in an application?

What is the difference between @Component and @ComponentScan annotations in the Spring Framework?

How can changes be transferred from one branch to another in a version control system?

Can you explain what is meant by automated application deployment?

What are the differences between methods that support the use of coroutines and those that are not designed to work with them?

Junior — Middle

Альфа-Банк

Is it possible to start working with ResultSet if the current element is not yet selected or absent?

What situations or tasks would you prefer to avoid in your new position?

Which project or task interests you the most and why?

Junior — Middle

Совкомбанк

Can you name the main components that make up object-oriented programming?