If you have min 1 year exprience then you can apply for the post of TO 'C' from ECIL official website. In this interview based on requirement they ask. On my interview requirement was web development so they asked about your previous project. Also about DBMS Concept(Normalization, Transaction, Sql query, Details aboutb Joins). They also ask about vb.net based on requirement and how SDLC work, Security concept like encryption, parameterized query etc.