Quite lengthy, about 5 different interviews with the last one being a full day event. From beginning to end, was likely a 3 month process or so. Have heard this is longer than normal, however.
I applied online. I interviewed at Illumina (Singapore) in Mar 2015
Interview
Assessment centre where you have to work with other people on a unique and fun problem solving question, followed by a presentation on a topic such as why you should not let your kids go to school, or other weird topics. After that, there was a standard interview, and a networking session. There were many brilliant students, and it would be better if you had many questions during the networking session.
Interview questions [1]
Question 1
What made you stand out from the rest of the applicants?