Which of the following aggregate commands in MongoDB uses a pipeline approach with the goals of improving the aggregation performance?
In a replicated cluster, which of the following node would only be used during an election?
Which command is used to determine storage capacity of specific database?
The oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. All the replica set members contain a copy of the oplog in the following collection:
Which of the following command inside aggregate command is used in MongoDB aggregation to filter the documents to pass only the documents that match the specified condition(s) to the next pipeline stage.
Which of the following commands can cause the database to be locked?
Which of the following is incorrect statement about find and findOne operations in MongoDB?
Which of the following is true of the mechanics of replication in MongoDB? Check all that apply.
Consider the following posts document:
Which of the following queries will return the documents but with only the first two tags in the tags array?
