NTT DATA Salesforce Developer interview questions

I was repeatedly asked to go down their office on working day. But then they scheduled a telephonic round which was technical and took more than an hour. I had good experience with this interview - and was evaluated across all areas of salesforce. Then i was asked to come down to office again on a working day for an hour for managerial round. But when I reached there I was given pen/paper and asked to write down codes for a few functionality which also included a whole lightning page which is actually difficult cause it also included UI coding and pen/paper is not the right way. after clearing the round I was told that they are not sure what was asked in my initial rounds so they scheduled another technical round - i was bit annoyed and this time the questions were downright theoretical and confusing. Usage on abnormal jargon without actually explaining what they mean to ask. Once I cleared this I was again asked to wait for another round and mad eme wait for an hour- by this time it was late and I felt like the interview was not going anywhere . So I decided to leave for the day and schedule the next round another day. With so many unannounced rounds I had lost interest in NTT data. Its tiresome and annoying. More theoretical or bookish confusing questions rather than practical ones. Many repetitive rounds.