Explanation:The strength of the write concerns determine the level of guarantee. 2. Point out the correct statement :
A. Read operations on sharded clusters are most efficient when directed to a specific shard
B. Sharded clusters allow you to partition a data set among a cluster of mongod instances in a way that is nearly transparent to the application
C. For a sharded cluster, applications issue operations to one of the mongos instances associated with the cluster
D. All of the mentioned
Answer:A
Explanation:The strength of the write concerns determine the level of guarantee. 2. Point out the correct statement :
A. Read operations on sharded clusters are most efficient when directed to a specific shard B. Sharded clusters allow you to partition a data set among a cluster of mongod instances in a way that is nearly transparent to the application C. For a sharded cluster, applications issue operations to one of the mongos instances associated with the cluster D. All of the mentioned
Explanation:Queries to sharded collections should include the collection’s shard key. 3. When inserts, updates and deletes have a _________ write concern, write operations return quickly.