There were basically four rounds -
Round 1- Shortlist on the basis of Resume.

Round 2- written test on hackerearth, it was about 1 hour test which consist 4 technical mcq ( easy from os and cso) and one medium code
find the Problem https://brainly.in/question/24370965?tbs_match=3

Round 3- Interviewer asked me 5 code (only logic no need to execute and for 1 question psudo code)
1- if string contain any duplicate char return false
2- triplet sum problem
3- Given N natural Number in which anyone number is missing and anyone is double find the missing number
4- to find contact name in contact diary which ds you ll use( TRIE)
5- given 2d matrix reach from top-left to bottom-right with minimum sum(DP)

Round 4(final Round)- He asked me about virtual memory, joins, bfs dfs, polymorphism,garbage collector and about challenging Projects