Difficulty
Experience
Phone interview: 33%
Skills test: 17%
One on one interview: 13%
Presentation: 10%
IQ intelligence test: 8%
Background check: 7%
Personality test: 6%
Group panel interview: 6%
Other: 1%
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Application
I applied through college or university. The process took 3 weeks. I interviewed at Optiver (Chicago, IL) in Oct 2011