I applied through a recruiter. I interviewed at WPP (New York, NY) in Feb 2011
Interview
The interviewers were often confused, didn't read my resume, didn't know a lot about the job requirements. They mostly spoke about the clients personalities and company culture. My impression of the office wasn't great it seemed dark and dingy but the people were nice and fun.
Interview questions [1]
Question 1
(knowing nothing about the client/no background) what would you do to increase sales?
I applied through college or university. The process took 2 weeks. I interviewed at WPP (New York, NY) in Jan 2016
Interview
I met representatives at a school event, introduced myself and got their contact information. I applied with a resume and cover letter through a professor and went in a week or so later for an interview. I interviewed with a total of 3 people over a 2+ hour period. I also had to fill out a questionnaire.