The overall process was interesting. What I liked about this process is that they have a different approach than other big companies:

• They ask you to prepare a presentation on some of your past technical challenges.
• You may speak directly with the CIO.

I had the following questions during the phone screening:

• Tell me about the usage of map and grep in Perl.
• Code a function that merges two lists while removing duplicates.
• Write a simple crawler without specifics (just some DFS).

Also, I had onsite interviews with the following questions:

• Write code for finding the shortest path on a chessboard.
• Write code for composing a cloud of tags from text, discussing alternative approaches and scalability issues.
• Write code for determining crawler bots by analyzing web server logs.
• Explain some Perl code.

Of course, they asked to evaluate the runtime complexity of the written code.

The questions were interesting but not unexpected.