Position: Test Engineer
I applied on Facebook portal and got call within 2 weeks. First round was recruiter pre-screen. He asked me below questions (python specific due to mentioned JD):

1. What do you mean by slicing?
2. What is negative indexing?
3. How would you count duplicate characters in a string?
4. What do you mean by serializing and why would you use it?
5. When do we use 'pass' statement in python?

Although, I later got rejected over email.