first was an online interview which i was noted of by mail, and then a mail was sent for an aptitude test after which we had a physical interview at the company's premises

The whole interview process will be 1. Written test comprising of both aptitude and C language. Aptitude of basic level and they will ask outputs of the C programs in the questions 2. Two technical interviews. TR-1 is quite easy but TR-2 is a bit difficult compared to TR-1. 3. CEO round which can be considered as an HR round