Correct Answer : rs.syncFrom()
Explanation : rs.syncFrom() provides a wrapper around the replSetSyncFrom, which allows administrators to configure the member of a replica set that the current member will pull data from.
Correct Answer : sh.disableBalancing()
Explanation : sh.disableBalancing() does not affect balancing of other collections in a sharded cluster.
Correct Answer : sh.getBalancerHost()
Explanation : sh.enableSharding() enables sharding on a specific database.
Correct Answer : sh.getBalancerState()
Explanation : sh.getBalancerState() returns true when the balancer is enabled and false if the balancer is disabled.