HCLTech Technical Lead interview questions

Applied through HCL website. Interview was on weekend. It was a walk-in although the HR didn't mention this anywhere in the email. That resulted in a waiting time of close to 3 hours before I got to my interview. Interview difficultly was high.

Initially they informed me about the client that I will be working with and all rounds of interview happened with client directly. 4 telephonic rounds each for specific skills and followed by 2 face-to-face rounds at client location. It was positive from client side so later had one HR discussion with HCL.