It was a pretty long process.

It started with the recruiter talking to me about the role and my expectations, followed by telephone and in-person interviews.

The entire process took about five weeks, but I was kept updated throughout.

The telephone round focused on the fundamentals of front-end engineering, including HTTP, web page performance tuning, and why I wanted to join Yahoo.

The in-person interviews were more elaborate. I was asked to write some code and explain a few page load optimization techniques, besides questions on design, algorithms, and some math.

Given a web server log file that runs into millions of lines, write a script to pull up the top 100 users by visits and the last timestamp of their access.