Which of the following options does the main role of Zookeeper in distributed applications not include?

• A.Ensure data consistency on each node
• B.Allocate cluster resources
• C.Election of Master Nodes
• D.Store server information in the cluster

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Hadoop's NameNode is used to store metadata of the file system.

• A.True
• B.False

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The following offon HDFSarity ofholding a spoontransformedProcess description,pleaseArrange from top to bottom in the correct order.

• A.to avoid?Increasing,?will be merged periodically?become new?.
• B.Saccn? ?node periodically fromMa? ?download?and?files
• C.put frimage?combine into new? ?document.
• D.to replace?file, and will?coincident name?make up new?and and.
• E.in HDFS Sectionformat onceRear,?will generate fs?me and?twodelivery

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Which of the following factors contributed to the vigorous development of the era of big data?

• A.all of the aboveA. True
• B.The popularization of smart terminals and the improvement of social demands
• C.Reduced hardware costs and increased network bandwidth
• D.The rise of cloud computing

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In the Output stage, Structured Streaming can define different data writing methods, including which of the following methods?

• A.Update Mode
• B.Ccomplete Mode
• C.Append Mode
• D.General Mode

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