The aptitude round took place online mostly comprising of technical aptitude - networking, linux commands, quantitative aptitude, verbal. Interview was a few days later Interview there were 3 technical rounds. 1st Round: The interviewer looked at resume, asked questions based on project and asked to solve some problems based on project. Asked to write the queue operations in python. 2nd round : 2nd interviewer asked to reverse a string using any language. the next question was a quantitative aptitude question 3rd Round : Company MD was the interviewer He went through the resume, asked questions based on resume. Asked two puzzle questions. Based on the solution asked to write an algorithm for it, and asked the time complexity (Big O) notation for it, which i could not answer. Then he asked a programming question : if two arrays contain a number of elements, some elemnts maybe repeated, combine the arrays and the combined array should be in sorted order.