Java

What signs indicate the need to create an index in a database?

Junior — Middle

Альфа-Банк

How can you iterate over all keys and values in a Map object?

What happens inside a HashMap when two keys lead to the same hash bucket?

Junior — Middle

СБЕР

What is the average number of operations required to perform the main search or insert operation in a HashMap data structure?

Junior — Middle

СБЕР

Explain the principle of the double-checked locking method in the context of multithreading.

What is the main role of the Jakarta EE platform in enterprise application development?

Junior — Middle

Aston

Did all team members participate in the code review process?

Junior — Middle

СБЕР

How is the storage of application components inside a Docker image implemented?

What is the main role of single-threaded programs in development and in what situations are they required?

How are parallel streams implemented in the Stream API?

Junior — Middle

ОТП Банк

What are the advantages and disadvantages of using try-with-resources in Java for resource management?

Can you explain what the SOAP protocol is and how it is used in data exchange between systems?

Which method of an object is most frequently used in programming practice?

Have you created or sent requests to external or internal services in your work?

What difficulties may arise when using composite indexes in a database?

Junior — Middle

Aston

Tell about nested classes and in what cases they are used.

Have you applied the principle of avoiding duplication in your code?

What approaches can be used to solve problems that occur when calling UserRepository.findById() and User.getEmails().forEach(), if the getUsers() method is annotated with @Transactional and the email field is declared as @OneToMany?

Middle — Middle+

СБЕР Корпус

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

Junior — Middle

Норд КланIT Oneylab+2

How is the pattern for creating objects implemented in programming?