Java

Can you explain what the Map interface in Java is and how it is used?

Junior — Middle

СБЕР PayБанк Россия

What is the difference between composition and inheritance?

What is the difference between object-oriented programming and functional programming?

Can the Entity class be abstract?

What are the main differences between a topic and a queue in a messaging system?

How does the Thread.join() method work?

Could you explain what is meant by 'isolation' in the context of databases or system architecture?

Junior — Middle

Aston

Are you responsible for maintaining and operating the services in production?

Junior — Middle

СБЕР Тех

In which situations should the synchronized keyword be used in a programming language to ensure thread safety?

Junior — Middle

СБЕР

How and when does the increase in the number of buckets in HashMap occur?

To which constructs in Java can the static modifier be applied?

What is the significance of using polymorphism in object-oriented programming?

What is the difference between creating a string with double quotes and calling the new String constructor?

What are the forms of writing try/catch blocks in Java?

What is a local class and what are its features?

Have you used virtual tables in your SQL queries?

Junior — Middle

Aston

What are the main principles of encapsulation in object-oriented programming?

Where can the Singleton pattern be used?

How can a monolithic application be transformed into a set of separate microservices?

What are the features of using ResultSet in JDBC and its configuration?