MongoDB DBA Associate Practice Questions - MongoDB Associate DBA Certification Exam

What is the oplog in MongoDB replication?

A capped collection on each replica set member that records all write operations for replication A log file on disk that records all mongod startup events A collection storing the replica set configuration and member states A network buffer holding write operations waiting to be sent to secondaries

Correct Answer:

A capped collection on each replica set member that records all write operations for replication

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