HCLTech Technical Architect interview questions

Over all good experience, totally 4 rounds of interview, 1st level of technical is some what easy some scenario based and theoretical questions on Mainframes have been asked. 2nd level of technical was more complicated than 1st level, coding for some concepts like palindrome and for a given scenario a query has been asked. Everything we need to write the hard code or logic in a notepad. Once after clearing the 2 rounds, HCL released the offer letter and after getting in to HCL there were another 2 rounds internally to get selected in to project. One is internally and another is client round.