In YRAN's tag-based scheduling, which of the following options is tagged?

• A.NodeManager
• B.APPMaster
• C.ResourceManager
• D.Container

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Spark and Hadoop are not suitable for iterative calculation computing.

• A.False
• B.True

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

• A.False
• B.True

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If HDFS is deployed with a single name node, what limitations may exist? (multiple choice)

• A.The number of objects (files, blocks) that a name node can hold is limited by the size of the memory space
• B.The amount of leaf swallowing of the entire distributed file system is limited by the throughput of a single name node
• C.It will affect the functional implementation of the upper-level components based on HDFS
• D.Failure of this unique name node will render the entire cluster unavailable

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Which of the following statement about the segment file in Kafka Logs is correct? (Multiple choice)

• A.Sparse storage, that is, the original complete data, only select multiple data at intervals for storage
• B.All index metadata is mapped to memory, which can avoid the index data IO disk operation of sementfile
• C.Messages can be quickly located by indexing information
• D.The index file is stored sparsely, which can greatly reduce the space occupied by the index file metadata

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