When a chunk grows beyond the chunk size, MongoDB attempts to split the chunk into smaller chunks, always based on ranges in the _____________
(a) replica set
(b) shard key
(c) tag sets
(d) all of the mentioned
The question was posed to me in an international level competition.
My question is taken from Sharded Cluster Behavior topic in division Sharding Concepts, Mechanics and Sharded Cluster of MongoDB