title: MongoDB Find and Remove Algorithmic Complexity
body: <p>What is the big-o complexity of MongoDB find operation and remove operation. Say I have n strings in my MongoDB collection - 'abc' and I query the collection 'abc' using abc.find() to get all the elements in abc what is the runtime complexity of this operation?</p>
  
  <p>Also, if I do abc.remove({"string": s}, what would the runtime complexity be for that, given I have n elements in my collection?</p>