Not really, as its telecom & service based company, its more of kpo. they have little scope here. But it can be used for managerial qualifications along with functional technical expertise.
Only simple network based questions. Basics of networking from engineering. If you are CCNA certified, then the questions would be tough enough.
I am leaving Tata for my personal reasons i.e. my financial concerns which is forcing me to look for a alternate job.