One of the toughest interviews I had faced in my life (I have even been interviewed by Microsoft, Redmond, this interview was on par with that but you get to enjoy every bit of it ), Akamai does their best at making you understand what the company stands for and what exactly their are looking for in their candidates. They held an OpenHouse event for all the potential candidates where the candidates even get to have an informal chat with the managing director of Akamai, India.
The whole process begins with a telephonic interview where they see how good your at holding a normal conversation and how well your English is. During this they ask you about your resume and one or two logical questions. Answer them with ease don't show any signs of hesitation if you don't know the answer, humor them, might work!!
The next stage is presentation where half n hour you have to give a presentation on a topic given by the HR(dont worry you will be given ample amount of days to prepare for it) , and another half n hour on a topic of your choice. After the presentation and during the ppt they will ask you a couple of technical questions(typical brainstorming round where they test your presence of mind, your aptitude, how do you perform under pressure and stuff). Have a confident look and be honest in your answers, remember they know more than you do.
The next stage is a listening and writing round very similar to an IELTS/TOFEL (english test taken for US admissions) except that here you will be listening to Indian English rather than American/British English. This the simplest round.
The final stage is a HR round where there will be a One on One with a senior HR asking you typical behavioral questions. This round can be cracked by anyone with a good heart.
Overall the character of the interviewers were calm and collected, humorous, heart filled, intelligent, remember they reflect your behavior, so if your open-minded and happy then you will feel the same. At the same time they do pack in the suspense for you, you will call all the Gods you know by names hahaha.
So Good Luck guys!!! Just smile it helps a lot and don't hesitate.