First of all, you have to give TCS NQT exam. It contains Aptitude from basic to advanced and 2 coding questions which are fairly medium level but the brut force approach works. Upon Clearance, you'll get interview call.

My interview was around 35 minutes . The panel had three members they begin the interview by asking my introduction and then they asked me to solve a coding question on paper then they asked me about various questions such as views in sql , sql queries , my project work dsa questions such as dijkastra's algorithm , various traversals for tree and when to use which traversal , they asked about various machine learning algorithms and advanced cloud computing stuff .