Java

When does a hashCode collision occur in HashMap?

Which data structure provides maximum speed for the Command pattern, and what can it be replaced with?

How did you add new features to your last implemented project?

Junior — Middle

СБЕР

What data structure does LinkedList implement?

What is the application of inheritance mechanism in object-oriented programming?

Can you explain what is meant by 'method reference' in programming?

What are the purposes of functional interfaces like Consumer<T>, DoubleConsumer, IntConsumer, and LongConsumer?

What are the advantages and disadvantages of using the Builder pattern when designing objects?

What is lazy loading?

What dependency injection (IoC) implementations do you know?

What is a LinkedList?

Is it possible to make the main program thread a daemon?

What is the difference between an exception and an error in Java?

Что выполняется раньше: оператор WHERE или оператор JOIN?

What does the collect method do in Java?

Can you explain the concept of method overriding in Java?

Junior — Middle

Госуслуги

From the SOLID principles, which is considered the most important and what is it used for?

Junior — Middle

IT One

What methods have you used to improve the performance and scalability of relational databases in your projects?

What commands do you use in Git?

What are the differences between the JOIN and LEFT JOIN operators in SQL, and when is each better to use?