What are the usual guarantees for Kafka message transmission? (Multiple choice)

• A.At Most Three Times
• B.At Lease once
• C.At Most once
• D.Exactly Once

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Which of the following options in HBaser command has the worst performance

• A.list
• B.put
• C.Scan
• D.get

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Flink provides built-in state management that canput at workstatesave atFlin1k internal,AgainNo need to store it in an external systemsystem. SuchThe benefits include which of the following options

• A.Ensure data consistency during processing
• B.on performancebeltcame greatpromote
• C.achieved highswallowspit, high sexual characteristics, but unable toDoarrive?extendlate guarantee
• D.droplowcomputing engineDependence on external systems makeshave to deploy, operation and maintenance is simpler

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Hadoop's NameNode is used to store the metadata of the file system.

• A.True
• B.False

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In the era of big data, which of the following challenges are faced by enterprises?

• A.Diversified data structures.
• B.Scattered data has problems such as noise, missing, and non-standard storage types, which requires a lot of data preprocessing.
• C.Data is scattered among various departments of the enterprise, and the same data is stored in different formats within each department.
• D.technological advancements of competitors.

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