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

• A.False
• B.True

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What is the correct description of the Loader job in Fusionlnsight HD?

• A.After the Loader submits the job to YARN for execution, if the Loade transaction is abnormal at this time, the job execution fails.
• B.After the Loadet job fails to execute, garbage data will be generated, which needs to be manually cleared by the user
• C.After the Loader submits a job to YARN for execution, no other jobs can be submitted until the job is completed.
• D.After the Loader submits the job to YARN for execution, if a Mapper task fails to execute, it can automatically retry

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NodeManager memory andCThe number of PUs is configured by which of the following options?

• A.YARN.nodemanager.resource.cpu-vcore
• B.YARN.modemanager.resource.memory-mb
• C.YARN.scheduler.capacity.root.QueueA. maximum-capacity
• D.YARN.nodemanager.vmem-pmom-ratio

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Kerberos, as an authentication server center, can provide unified authentication services to all services in the cluster and secondary development applications of customers.

• A.True
• B.False

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In Flink, the checkpoint mechanism can ensure that when the application fails during operation, it will be restored from a certain checkpoint. In this process, the stream snapshot is established based on the data inflow.

• A.False
• B.True

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