[EdwardDiego]

> However knowledge of pointers, lists and b-trees have been very helpful multiple times throughout my career.

Indeed. And such glorious moments they are when choosing the right data structure drastically improves performance.

However, if I were interviewing for a Rails developer position, the last thing I'd anticipate having to bone up on is algorithms and data-structures. I'd be expecting to be asked about... well, doing stuff in Ruby on Rails.