Which of the following steps are involved in preparing for Fusioninsight HD installation? (Multiple choice)

• A.Complete the node host operating system installation
• B.Complete the hardware installation
• C.Prepare tools and software. Such as Putty, LLD, Fusioninsight HD software installation package, etc.
• D.Prepare planning data, such as network parameters and role deployment location

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Which nodes are required to communicate with external data sources before and after the Fusioninsight HD Loader job?

• A.Loader service master node
• B.Neither of the first two are needed
• C.Both of the first two are required
• D.The node on which the YARN service job is running

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HUAWEI CLOUD MapReduce service provides tenants fully controllable one-stop enterprise-level big data cluster cloud service, fully compatible with open-source interfaces, combined with HUAWEI cloud computing, storage advantages and big data industry experience, to provide customers with high performance, low cost, the flexible and easy-to-use full-stack big data platform can easily run Hadoop, Spark. HBase, Kafka, Storm and other big data components, realize real-time and offline analysis and mining, and discover new business opportunities.

• A.True
• B.False

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Which of the following functions can be achieved by the kafka-cluster mirroring tool?

• A.Kafka single cluster data backup
• B.Kafka single cluster data recovery
• C.None of the above is correct
• D.Kafka cluster data synchronization solution

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ElasticSearch's shards index sharding can disperse index data to different nodes.

• A.True
• B.False

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