Mongo findAndModify

HERE
Implementing queues is a good use case for findAndModify


Which of these statements are true?

findAndModify is atomic.Update operations which update a single document are atomic.Usually, update is faster than findAndModify.

{
  findAndModify: <string>,
  query: <document>,
  sort: <document>,
  remove: <boolean>,
  update: <document>,
  new: <boolean>,
  fields: <document>,
  upsert: <boolean>
}

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