Hi candidate,

I hope you are doing good. Congratulations for your best score in class 12th from Tamil Nadu board. If your is to complete M.Tech in Computer Science, you need to pursue an undergraduate course called B.Tech in CS or IT. Prepare for your JEE Mains and Advanced, then qualify for taking admission in some good college. You can even pursue state level government colleges as your aim is M.Tech, but I suggest you to keep jobs as option in between.

Now, from second year onwards, start preparing for GATE. It is a national level exam for taking admission in Post graduate courses of MTech.

Once qualified, you are good to go with MTech in Computer Science. I don't suggest you to pursue MTech from state level colleges instead do job at low salary for a year.

I hope it covers your query.

Thank you!