I applied online. The process took 4 weeks. I interviewed at Unilever in Jan 2016
Interview
Basically submitting a 2-page letter on a contemporary company problem, and a behavioural interview. The 2-page letter is to test the written reasoning of the candidate and your business sense. You have plenty of time to complete the letter. My advice would be to look for academic articles on the matter.
Interview questions [1]
Question 1
Basic questions such as 'Why Unilever?' and more situation-based questions such as 'Tell me about a time that you were in a team that was very demanding for you'.