I applied online. The process took 1+ week. I interviewed at Adecco (New York, NY) in Apr 2011
Interview
If they want to submit you for a job, they'll contact you immediately and everything will be sorted out in a few weeks. If not, don't expect to hear from them at all unless you pester about other openings. Some Adecco employees are very friendly and helpful, but they seem to have a high turnover, like lots of temp agencies, and are extremely self-serving in salary negotiations. I think because some companies have contracts with them, they feel as if they can get away with that.
Interview questions [1]
Question 1
I had to take several tests, including a proofreading marks test. You are only recommended for jobs unless you pass a certain threshold. I think it's 80%
I applied through college or university. The process took 5 days. I interviewed at Adecco (Ann Arbor, MI) in Oct 2013
Interview
It was professional, assessments test required, explanation of requirements for this job, background check required. Explanation what was expected from me and how to present myself once when hired.