In the collaborative work of Zookeeper and YARN, when Active ResourceManager fails, which of the following directories will Standby ResourceManager obtain application-related information from?

• A.State store
• B.Storage
• C.warehouse
• D.Meta store

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User authority management role-based access control (RBAC), providing visual multi-group unified cluster user authority management.

• A.True
• B.False

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Which of the following can be viewed in the Loader history job record? (Multiple choice)

• A.Dirty data link
• B.Job start/run time
• C.Number of error lines/files
• D.Job status

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To reduce the amount of data written to disk, mapreduce supports compressing MOF (mapoutfile) before writing.

• A.True
• B.False

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What are the correct understandings and descriptions of the main features of big data?

• A.Fast data growth and fast processing
• B.Low data value density, high value
• C.Many data sources and formats
• D.Large amount of data, large amount of calculation

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