The first round was the Aptitude Test. It was an adaptive test, covering general aptitude questions and numerous series-based questions (e.g., find the missing number, complete the following series).

The second round was an English Assessment Test. It tested the proper use of punctuation, the format of formal letters, and the correct use of articles, prepositions, and conjunctions.

The third round was the HR round. Questions asked were general HR questions such as: "Tell me something about yourself," "What past projects have you worked on?" "Tell me about your strengths and weaknesses," and "Why IBM?"

For aptitude tests, questions on series are really important.