HCLTech Technical Lead interview questions

It was a walk in and first time I was attending a walk in interview. More than 60 people and only 1 person available for taking interview. Worst interview process HCL is having. I reached office by 9 AM and left by 5 PM after completing 2 rounds. I was told that you have been selected and HR will call for further discussion. Next day i received mail from HR for submitting some documents and after that 3 weeks passed and no update. Usually they recruit for projects where there will be 1 or 2 vacancies and around 100 people will attend interviews. I simply wasted my whole day. Dont waste your time guys if it is a walk in interview. They wont even update you whether they are going forward. The funny part is I again got a call from another HCL HR for another project. I simply said I am not interested.