Point out the correct statement.(a) The amount of oplog to keep per backup is configurable and affects the time window available for checkpoint and point-in-time restores(b) To get a consistent snapshot of a sharded system, you must enable the balancer(c) Backups produced by copying the underlying data do support point in time recovery(d) All of the mentionedThis question was addressed to me in an internship interview.The query is from MongoDB Backup topic in chapter GridFS, BSON Datatype and Administration Concepts of MongoDB

Point out the correct statement.(a) The amount of oplog to keep per ba

1.	Point out the correct statement.(a) The amount of oplog to keep per backup is configurable and affects the time window available for checkpoint and point-in-time restores(b) To get a consistent snapshot of a sharded system, you must enable the balancer(c) Backups produced by copying the underlying data do support point in time recovery(d) All of the mentionedThis question was addressed to me in an internship interview.The query is from MongoDB Backup topic in chapter GridFS, BSON Datatype and Administration Concepts of MongoDB
Answer» Correct option is (a) The amount of OPLOG to keep per backup is CONFIGURABLE and affects the time window available for CHECKPOINT and point-in-time restores Easy explanation: When you RESTORE from a checkpoint or point in time, Ops Manager first creates a local restore of a snapshot from the blockstore and then applies STORED oplogs until the specified point is reached.

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