Explanation:MongoDB allows clients to read documents inserted or modified before it commits these modifications to disk, regardless of write concern level or journaling configuration. 5. Point out the wrong statement :
A. When a query does not include a shard key, the mongos can use cluster metadata from the config database to route the queries to shards
B. On larger clusters, scatter gather queries are unfeasible for routine operations
C. Replica sets use read preferences to determine where and how to route read operations to members of the replica set
D. None of the mwntioned
Answer:A
Explanation:MongoDB allows clients to read documents inserted or modified before it commits these modifications to disk, regardless of write concern level or journaling configuration. 5. Point out the wrong statement :
A. When a query does not include a shard key, the mongos can use cluster metadata from the config database to route the queries to shards B. On larger clusters, scatter gather queries are unfeasible for routine operations C. Replica sets use read preferences to determine where and how to route read operations to members of the replica set D. None of the mwntioned
Explanation:If a query does not include the shard key, the mongos must direct the query to all shards in the cluster. 6. _____________ is used to control mongod commits in the journal.