Multiple choice general knowledge CEO Of Microsoft Bill Gates John Chambers Steve Ballmer Vittorio Colao Reveal answer Fill a bubble to check yourself C Correct answer Explanation Steve Ballmer served as CEO of Microsoft from 2000 to 2014, succeeding Bill Gates who founded the company. Bill Gates was CEO before Ballmer but stepped down to focus on philanthropy. John Chambers was CEO of Cisco, and Vittorio Colao led Vodafone.