Java

Can you explain the internal structure of HashMap implementation?

What type of index is used by default in the PostgreSQL database?

Junior — Middle

AstonА ДеньгиСеверсталь-Ифоком

Is adding an element to an ArrayList always O(1) in complexity?

Do you prefer working in an office environment or remotely?

Intern — Junior

СБЕР

Have you used the Gradle build system in your projects?

Why are immutable objects used in programming?

Can you name the types of references used in Java for managing objects?

What difficulties do beginners face when learning new knowledge or skills?

How does a transaction ensure data integrity and safety in a system?

What version of the Java platform was used in your last job?

Have you had experience with virtual threads in Apache Kafka?

Junior — Middle

СБЕР

What methods can be used to configure and set up components in the Spring framework?

How to determine which segment or category your data belongs to?

How does the internal structure of a doubly linked list differ from a singly linked list?

What are the advantages and disadvantages of using dependency injection through constructors for Bean objects?

Have you had experience applying aspect-oriented programming in your projects?

Can you explain how the Lazy loading strategy works in JPA/Hibernate?

How does an index speed up data search by a specific field in a database?

Junior — Middle

СБЕР

Have you participated in programming competitions or contests in Java?

How to establish direct communication with the customer, bypassing intermediaries?