The process took 1 day. I interviewed at LinkedIn (Mountain View, CA) in Nov 2009
Interview
I was asked a combination of algorithm and coding questions as well as design questions.
The interviewers were pleasant and would offer hints when I got stuck.
I thought I did well but apparently some of them thought that they had to offer me hints and another one felt that I was giving very short answers.
Would have loved to get an offer, but that was not to be :-)
Interview questions [1]
Question 1
Given a grid of size m by n, write an algorithm that computes all paths from 0,0 to m,n such that you can always step horizontally or vertically but cannot reverse.