I was approached by the recruiter to interview.

Round 1:
Mostly typical OS , Multithreading , Network questions.

1. Explain OSI Model
2. Why Redis is fast ?
3. What is cookie ?
4. Have I used multithreading or parallelism and how? etc

I was unprepared for it so kinda bombed it.

HR told me it would be DSA and Desing Pattern round. I had exclusively prepared for it . Dissappointed there was no DSA or LLD question. Feels like a waste of effort and time. Could have answered all questions well with few days of revision.