OA:
Similar to "Smallest subarray with sum greater than a given value"
Easy-Medium question. Couln't find online. Don't remember exact question.
Solved both. Got to know that even solving one will promote to the next round.
Coding:
Compiler needs to compile files based on the dependency order. Return true if it is possible to compile all the files.
Similar to https://leetcode.com/problems/course-schedule/
Solved using kahn's algorithm. Need to write working code.
Followup question - how does the given solution handle cyclic dependency
Low level design for garbage collector.
Operating system questions like thread vs process, concurrency vs parallelism, etc.
Questions on how internet works, DNS, etc.
LLD:
Design a Parking lot.
Interviewer requirements - Design keeping in mind that there are only 10 parking spots, only 1 vehicle type is available, single floor/entrance/exit.
Verdict - Rejected. LLD didn't go well.

