HDFSThere is a file in the cluster and directorytext.txt, which of the following commands can find theDatNodenode information?

• A.hdfs fsck /test.txt-list-corruptfileblocks
• B.hdfs fsck /test.txt-blocks
• C.hdfs fsck /test.txt-files
• D.hdfs fsck /text.txt-locations

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existSpark, which of the following is trueDataFrameThe operator that takes the intersection?

• A.Join(right:DataFrame,joinExprs:Column):DataFrameaccording to the specified expressionjoin
• B.filer(conditionExpr:String):DataFrameFilter data based on filter criteria
• C.intersect(other:DataFrame):DataFrameright2indivualdataframeTake the intersection
• D.dropDuplicates():DataFramedata deduplication

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aboutKafkaThe characteristics of the following description are correct? (multiple choice)

• A.KafkaIt is a high-throughput, distributed, publish-subscribe-based messaging system
• B.KafkaApplicable to offline and online message consumption scenarios
• C.KafkaPersistence of messages
• D.Kafkaguarantee eachPartitionmessages in order

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In the online log query scheme, adopted? processing to complete the calculation work. During the whole calculation process, the intermediate calculation results need to be For temporary storage, which of the following components are suitable for storing intermediate calculation results? (multiple choice)

• A.Redis
• B.Kafka
• C.HBase
• D.HDfS

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existFusionInsight HDcluster, aboutkinitOperation command, which of the following statements is wrong?
(many select)

• A.Only the machine account can be used.
• B.Only use HMI account.
• C.A client does not support the simultaneous use of multiple accounts.
• D.The ticket obtained by executing this command is intwenty fourIt will time out when it is small and needs to be executed againkinitcommand to log in again.

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