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MongoDB achieves replication by the use of ___
37. MongoDB achieves replication by the use of ___.
- Replica set
- Data set
- $first
- All of the mentioned above
Answer: A) Replica set
Explanation:
Replication in MongoDB is accomplished through the use of replica sets. A replica set is a collection of mongod instances that are all hosting the same data set at the same time. In a replica, one node is designated as the primary node, and it is responsible for receiving all write operations.