MongoDB - Associate Developer Study Guide

2: CRUD, Including the Aggregation Pipeline

This chapter walks through the read and write operations an application developer runs against a MongoDB collection every day, starting from single-document inserts and deletes, moving through richly filtered queries and projections, cursor pagination, field and array updates with upsert semantics, and closing with the ordered stages of the aggregation pipeline plus full-text search on Atlas. The developer-visible controls over durability, snapshot freshness, and read routing sit alongside the write APIs so that the choice of write concern, read concern, and read preference is made in the same mental model as the CRUD call itself.