Explanation:The activeClients data structure provides more granular information about the number of connected clients and the operation types (e.g. read or write) performed by these clients. 2. Point out the correct statement :
A. In MongoDB 3.0, cursor.explain() returns the indexOnly field to indicate whether the index covered a query
B. When an index covers a query, MongoDB can both match the query conditions and return the results using only the index keys
C. For read-heavy applications, deploy sharding and add one or more shards to a sharded cluster to distribute load among mongod instances
D. All of the mentioned
Answer:A
Explanation:The activeClients data structure provides more granular information about the number of connected clients and the operation types (e.g. read or write) performed by these clients. 2. Point out the correct statement :
A. In MongoDB 3.0, cursor.explain() returns the indexOnly field to indicate whether the index covered a query B. When an index covers a query, MongoDB can both match the query conditions and return the results using only the index keys C. For read-heavy applications, deploy sharding and add one or more shards to a sharded cluster to distribute load among mongod instances D. All of the mentioned
Explanation:MongoDB does not need to examine documents from the collection to return the results. 3. The ___________ collection stores custom roles that administrators create and assign to users to provide access to specific resources.