Python

What are transactions and isolation levels in PostgreSQL?

What is the difference between if x: and if x == True:

What is OOP and its main principles?

What is the difference between == and is? What will print({1} == {1})?

What is GIL?

What is the difference between a list and a tuple?

What are generators and why are they needed?

What is ORM? Pros and cons?

What are the variable types in Python? Mutable and immutable?

What will be output?

What types of tests are there?

What will print(bool([])) print(bool([0]))