I wrote a blog on quora about my written test and interview experience at IIT Madras. Hope it helps next year aspirants.
https://sktdt.quora.com/IIT-Madras-MS-CSE-Written-test-and-interview
Edit: IIT Delhi M.Tech. in Computer Technology(EET) Interview
https://sktdt.quora.com/IIT-Delhi-M-Tech-in-Computer-Technology-EET-Interview
IISc CSA Intelligent Systems (M.Tech Research) Written Test and Interview
https://sktdt.quora.com/IISc-CSA-Intelligent-Systems-M-Tech-Research-Written-Test-and-Interview