C#

What delegates do you know?.

What to do if two different interfaces with the same method names are implemented in one class?

What are the disadvantages of indexes in the context of performance optimization?

Can you give an example of using Redis for storing and retrieving data?

What needs to be done to use a class as a key in a collection?

What is the 'Builder' design pattern and in which cases is it best to use?

В чем различие между оператором throw и throw ex в C# при выбрасывании исключений?

What are the differences between performing tasks immediately and scheduling them for later?

What to do if there are two interfaces with the same name?

Why were the 'ref' and 'out' keywords introduced for reference types in C#?

Do you have practical experience using container orchestration or deployment automation systems?

Can you explain what enum flags mean and how to use them in programming?

Can you give an example of a situation where a large object is allocated in heap memory?

Junior — Middle

OZON

What is the concept of garbage collection in C#?

Реализуйте интерфейс парсера IP-адресов: разделите строку raw по separator, верните IReadOnlyCollection<IPAddress>; при null выбросьте ArgumentNullException, при пустом separator — ArgumentException, при невалидном IP — FormatException.

Middle

Selecty

Can you list and explain the main SOLID principles applied in object design?

What security measures prevent SQL injection in a web application?

Explain what a relational database is and how it is structured.

Provide an example of implementing the 'Builder' design pattern in C#.

How does the async keyword and await operator work in C#?