Is MongoDB _id (ObjectId) generated in an ascending order?

Question

I know how the _id column contains a representation of timestamp when the document has been inserted into the collection. here is an online utility to convert it to timestam

Answer 1

_id: ObjectId(4 bytes timestamp, 3 bytes machine id, 2 bytes process id, 3 bytes incrementer)

This is the id structure. So only last 3 bytes will increment uniquely. So the answer of your question is yes.