existSpark, assuminglinesIs anDStreamObject, which of the following statements can periodically count the number of words on this stream?

• A.lines.flatMap(_.split??)).map(word=>(word,word.length())).reduceByKey(_+_).print ( )
• B.lines.flatMap(_.split??)).flatmap(word=>(word,1)).groupByKey(_+_).print ( )
• C.lines.flatMap(_.split??)).map(word=>(word,1)).reduce(_+_).print ( )
• D.lines.flatMap(_.split??)).map(word=>(word,1)).reduceByKey(_+_).print ( )

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FusionInsight HD assuming a topology, set the roadspoutConcurrency is3,bolt1Concurrency for2,bolt2Concurrency is3,workerThe number is2,Sobolt1ofexecutorexistworkerhow to divide Cloth?

• A.twoworkerone for each
• B.twoworkerBoth are distributed
• C.twoworkerone of theworkerdistribute two
• D.no fixed rules

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existFusionInsight HDproduct, aboutKafkaWhich of the descriptions of secure and non-secure ports is wrong?
(Note: oldAPImeans oldProducerAPIand oldConsumerAPI. Among them, the oldConsumer API:
Refers tokafka.consumer.ConsumerConnectorinterface defined in; oldProducerAPI:Refers to kafka.producer.Producerinterface defined in . )

• A.oldAPIpass through21005access to a portTopicThe premise is: server parameters allow.everyone.if.no.acd.foundSet astrue, and thisTopicnot setA, CLAttributes.
• B.for settingA, CLofTopic, you can use the oldAPIconnect21005port to access.
• C.oldAPIAccess only21005port; newAPICompatible access to non-secure ports21005and secure port
  21007.
• D.KafkaThe cluster security access port defaults to21007, the non-secure access port defaults to21005.

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aboutFusionInsight HDplatformHiveservice, itsWebHCatDevelopment interface, the following description does not the correct one is?

• A.Support based onRESTquery request
• B.WebHCatbased onHTTPandHTTPS
• C.WebHCatThe return data format isXML (Json)
• D.Agreement to provide services to the outside world able to passWebHCatCreate tables, query, etc.

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In useSolrWhen performing a full-text search, you canwtThe parameter specifies the response format of the query result. close AtSolrThe response format of the query result, which of the following statements is wrong?

• A.supportCSVandJSON
• B.supportCSV,JSONandHTML
• C.supportCSV,JSONandXML

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