There are 3 rounds.. L1 , manager and Hr rounds Interviewer expecting definition , because interviewer googling and asking the questions.. If we telling real-time example also he doesn't understand he want a perfect definition.. package main // while deploying your service with 3rd party vendor integrated its failed what we do? // go lang debugger have you used? // image is not there while deployment what should i do? // 1 go routine can send and receive in same go routine what happpend //what is deadlocak // postgresql vs mongodb // response is slow while json serialization what should we do? // interface // type of synchronous in go // how to debug memory leak in production // garbage collection in deep (tri color, mark and sweep algm) // struct vs type definition string/int/bool // microservices (even i explain in realtime he dont want that he wants definition) // composition // embedding a struct vs fields? // concurrency // data race,