Java

What happens when you call the stream() method on an ArrayList object?

Explain the concept of polymorphism in object-oriented programming and how it is implemented in code.

Which methods in Java do you consider the most important and most frequently used?

What is the role of the @Embeddable annotation in ORM tools?

Can you give an example of using queues for data exchange between microservices?

Junior — Middle

Яндекс

How can you invoke stored procedures in Java using the JDBC API?

If one service method calls another method annotated with @Transactional, does a new transaction get created?

On which object does synchronization occur when calling a static synchronized method?

What methods can be used to organize thread execution order in a program?

Have you worked with Java in the VK project?

How does Spring determine that a class is a component for dependency injection?

Is the array a primitive or an object?

What tools or methods have you used for testing your software?

Junior — Middle

Aston

What GoF patterns do you know?

What types of HTTP headers are used to specify the data format transmitted in requests or responses?

At what stage does data stream execution start in a Stream?

Junior — Middle

СБЕР Корпус

Which class in Java is the notify method intended for?

Junior — Middle

Aston

Is interaction between Java and PHP components ensured in the current project?

Junior — Middle

Газпромбанк

How many organizations have you already had in your work experience?

Can you explain what a problem during string data concatenation means?