C100DBA

Which of the following is true about sharding?A . Creating a sharded key automatically creates an index on the collection using that keyB . We cannot change a shard key directly/automatically once it is set upC . A sharded environment does not support sorting functionality since the documents lie on...

MongoDB isA . None of the aboveB . Object-oriented DBMSC . Relational DBMSD . Document-oriented DBMSView AnswerAnswer: D

Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?A . To help in disaster recoveryB . To protect agains network partitionsC . To enable certain read preference settingsD . To add greather redundancyE . For more efficient backup operationsView...