Java

How many new objects are created when adding a new element to HashMap?

Under what conditions can the use of the @Transactional annotation be ineffective or not work properly?

Junior — Middle

Aston

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

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 happens during the compilation process known as Building, and what does it lead to?

What task does the Spring framework solve?

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

What is the main role of the Java Virtual Machine in executing Java programs?

What is thread safety?

What is UML? Explain what a diagram, notation, and metamodel are in UML.

What is the application of linked list arrays in the implementation of the HashMap data structure?

How to properly close a database connection?

What are immutable objects?

What is dependency injection in software development?

How to iterate over all values in a Map?

Is it possible to narrow the access level or change the return type when overriding a method?

How to ensure access to object data within a method using the @Transactional annotation?

Junior — Middle

СБЕР

Have you developed a system for transmitting audio data supporting multiple language versions?