Round1 - tell me about a time, where you did not meet expectations?
well known system design question from SYSTEM DESIGN INTERVIEW book.
(did well, interviewer was happy with the answer provided)

Round2 - just discussed resume experience
similar to 2 sum question
(did well, made small mistake, corrected immediately, interviewer was happy)

Round3 - tell me about a time, where you improved something in your project?
tree problem, similar to finding path problem
(wrote some code, not sure correct or wrong, but interviewer said ok)

Round4 - just discussed current project, he asked good questions about my project( which i answered confidently)
well known question related to priority queue in leetcode
(did well, interviwer was happy)
(completed interview in just 30 mins, then he asked to optimize the queue problem, which we discussed for 15 more mins)

			Due to NDA, not able to share exact questions, Sry!
			
		Overall interviewes went well and easy(i just talked with interviewers like friends and gave answers with confidence), i was expecting offer but got reject in just 1 hr after the 4 rounds!
		
		I was very sad and i don't know whether i will make it to faang or not( i don't know whether i really need faang? I am confused!). But i love coding and software!
		
		I failed 5 to 6 interviews with different companies(including online assessment for some). I don't know where i am doing mistakes. One thing i know i am not good in trees and dynamic programming!