Python

What is an iterator and a generator, what methods should they implement, and what is the difference?

What is CORS, why is it needed, and how does it work?

What is the practical difference between using threads and asyncio in Python in terms of complexity and performance?

What are indexes used for in PostgreSQL, what are the advantages they provide, and what problems do they create?

What are the main data types in Python?

What are the main instructions that make up a Dockerfile?