Question

Point out the wrong statement.

(a) To change the size of the oplog, you must perform maintenance on each member of the replica set in turn

(b) Always start rolling replica set maintenance with the secondaries, and finish with the maintenance on primary member

(c) The oplog exists internally as a capped collection

(d) None of the mentioned

Answer 1

Right choice is (d) None of the mentioned

For explanation I would say: In most cases the default oplog size is an acceptable size; however, in some situations you may need a larger or smaller oplog.