I have gone to walk in and was selected after 1 Technical, 1 Managerial and the final HR round was done on the same day. The HR told me that they will call me within few days. After 10 days no response i dropped a mail to the walk in Interview co-ordinator through mail and then after 2-3 mail follow ups I got a response that I will check with the Interview pannel. Then almost 1 week past, I received a mail to submit my documents. Again no reply for 2 weeks. Then after follow with the Interview co-ordinator he sent me another email id to send the documents and again approx. 2 weeks later I received the offer letter. The most funny part happened when I have joined the organization, I came to know the skill for which they recruited I am the only resource from offshore.

Prepare for TCS interview with basic machine learning questions covering supervised learning, regression, classification, clustering, model evaluation, overfitting, and be ready to explain previous projects, datasets and outcomes clearly briefly