Java

Are you also ready for questions on this topic?

How to implement thread-safe singleton pattern in a multithreaded environment?

What data structure is used in ArrayList?

What is the purpose of the ORDER BY operator in SQL?

How can the efficiency of a loop that adds a large number of lines to an array or list be improved?

Have you used composite keys when working with Hibernate?

Junior — Middle

Северсталь-Ифоком

How much time is required to add a new node to the middle part of a doubly linked list?

Which configuration has priority: XML, Java, or annotations?

What is a branch in Git?

What is the difference between LEFT JOIN and INNER JOIN?

What is the purpose of the PushbackInputStream class in Java?

Is it mandatory to specify the alt attribute in the <img> tag?

What is a list (List) in Java?

What is sharding in the context of databases?

List the main aggregate functions.

Tell us how you delved into the details of this project.

What task does the Spring framework solve?

What methods can be used to view the list of previous changes in the code version?

How can you create and use functional interfaces in Java?

Junior — Middle

Aston

Can you name the main components that make up the structure of an HTTP request?