I applied online. The process took 3 weeks. I interviewed at National Instruments (Austin, TX) in Apr 2013
Interview
First apply online, then is the phone interview, and finally a visit to the office. From applications to phone interview, it took about two weeks, then an email to follow up and let you know whether you are moved forward yet, then offer was within a week.
Interview questions [1]
Question 1
Give me an example when you have done beyond your own responsibilities to help others