Java

What are the advantages and disadvantages of using ENUM in a database?

Share your experience with setting up and managing databases.

Junior — Middle

Иннотех

Have you had experience using technologies and tools for database migrations?

Junior — Middle

СБЕР

How to determine the total number of requests that occur during a search using a join of two tables?

At what stage of the interview is the use of a static synchronized method considered, and how is it used for access synchronization?

Junior — Middle

Альфа-Банк

Is it possible to have multiple elements with identical keys in a HashMap?

How can you implement storage and display of a genealogical tree structure in a relational database?

What key components or functions are missing in the current implementation of the project?

Junior — Middle

СБЕР

What is the main difference between the Comparable and Comparator interfaces in Java when sorting objects?

Does caching work only with databases, or are there other areas of its application?

What command-line arguments are available for JVM configuration when launching a Java application?

Which configuration do you prefer more: XML or annotations in Java? Why?

Can you explain the concept of splitting a database into parts to improve performance and scalability?

Junior — Middle

БАРС групп

How to distinguish between using @Autowired and @Inject annotations in the Spring context and how do they differ?

Is it possible to apply Spring annotations to private methods inside controllers?

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

Is it possible to use null as a key in a TreeMap data structure?

Can you explain the purpose and principle of the EXPLAIN statement in databases?

Have you independently configured or set up CI/CD processes or similar pipelines?

Junior — Middle

Лига Цифровой Экономики

Have you had experience configuring the -Xmx option in Java applications?