Java

How are elements stored in memory inside an ArrayList data structure?

What are the advantages and possible disadvantages of using the synchronized construct in Java?

Can you provide a link to the description of the task?

How can two microservices share access to a single database?

Junior — Middle

Иннотех

How can you identify users from the first table who do not have a related record in the second table using SQL?

Junior — Middle

СБЕР

What categories of security exist when processing arrays in programming?

Have you had experience working with Java Message Service (JMS) for message exchange in applications?

Junior — Middle

СБЕР

What is the difference between sleep and yield functions in process or thread management?

What actions will you take if the delays in database query execution become significant under increased system load?

Middle

Т-Банк

Can you explain how an atomic variable is implemented and works in multithreaded programming?

What is the main difference between the programming languages Java and JavaScript?

Have you applied reactive architecture in your projects?

What is the role of a hash function in implementing a hash map (HashMap)?

Can you explain what is meant by API Gateway and how it functions in distributed system architecture?

Middle — Middle+

Aston

Can a single-threaded call to a method declared with synchronized re-enter the same method during its execution?

Junior — Middle

Альфа-Банк

How can dependencies be injected through the Inversion of Control (IoC) container?

What design patterns from well-known ones have you used in your projects?

What are the main tasks solved by the Spring framework in application development?

Junior — Middle

МТСФормат кодаСБЕР Тех+7

What methods can be used to eliminate the OutOfMemoryError in applications?

Junior — Middle

МТС

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

Junior — Middle

Билайн