Which of the following statements is correct about the interaction between Flink and other components? (Multiple choice)

• A.Flink reads and writes data in the HDFS file system
• B.The implementation of Flink's checkpoint relies on Zookeeper
• C.The operation of Flink tasks relies on YARN for resource scheduling management
• D.Flink can send the received components to Kafka

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Spark and Hadoop are not suitable for iterative calculation computing.

• A.True
• B.False

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Through the unified user management system in the big data platform, the unified management of users, roles and organizations of various open source component application systems in the platform can be realized. Cross-domain single sign-on, log-out and unification between various application systems can be realized. identity authentication function.

• A.False
• B.True

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What query types does ElasticSearch have? (multiple choice)

• A.Search based on score
• B.Term-based search
• C.full-text search
• D.Retrieval based on metadata

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The OpenScanner process in HBase creates two different Scanners to read HFile and MemStore data. The Scanner corresponding to HFile is StoreFileScanner, and the Scanner corresponding to MemStore is MemStoreScanner.

• A.False
• B.True

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