Tata Communications Graduate Engineer Trainee interview questions

They asked me questions that are related to Mobile Communication, questions on GSM, CDMA, their difference and which is better. Then tested my knowledge about the present status of these technologies in the companies. Asked me about the difference between different generations of Mobile communication. And about MSC, BSC and stuff. After we were through this they showed as a presentation. The presentation was very basic in nature and had fact and abouts' of the TATA company. The HR interviewer asked as questions which were from the presentation he showed us asking us details that were mentioned in the ppt as a touch and go.. Then he asked me questions like what do you know about tata. I told them about a video i saw about TATA and so his next question was what else do you like to see on youtube... He asked me about what was the most recent technological realted video i saw and other stuff..