Hash Maps

A data structure that maps keys to values using a hash function to compute an index of buckets.

Interview Problems

Why do I see duplicate challenges? You'll see duplicates because a question may fall into different categories. We keep them here bec ause we believe that it is good to sporadically review old challenges. They are optional if already completd-- but reviewing them (and more importantly redoing them with the new knowledge) will ensure that you've let the material sink in.