The first 3 round prescreening, apitude test and gd is easy but final psychometric round is tricky
So be prepare for final round.
In Pre-Scenning and GD they will only see your skills to talk
In Aptitude test: You have to answer total 40 questions on 4 areas - Maths, English, Logical Reasoning and Spatial Reasoning, in 45 mins. In English, questions on grammar and passages were asked. Maths contained questions on Profit & Loss, Averages and Simple-Compound Interest. Logical Reasoning included Blood Relations, Directions, Series based questions. In Spatial Reasoning, the topics covered were Mirror & Water Reflection, Attention to details(e.g. count the no. of O's in a long sentence, count no. of circles in a figure, etc.). Except for some tricky questions, the level of the test overall was easy. No negative marking there.
For Psychometric go on online portal for practice