Thats depend on your interest. TCS is one of the top IT company. They do prefer electronics students also. If you prefer software field you can for it. But remember you won't get job based on your interest. They will allot you in a group based on there requirement.

A tough question. TCS surely is a good company to join in but the exposure ratio when compared to many other companies is not that much is what I have got to know about TCS. I would leave the choice to you.