Which of the following options is correct about the meaning of Zookeeper reliability?

• A.Reliability means that a message is received by one server, and it will be accepted by all servers
• B.Reliability means that the update can only succeed or fail, and there is no intermediate state
• C.Reliability means that no matter which server displays the same view to the outside world
• D.Reliability is achieved through active and standby deployment

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Spark is a memory-based computing engine. All Sparki program data in the running process can only be stored in memory

• A.True
• B.False

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Spark, like Hadoop, is not suitable for iterative computing.

• A.True
• B.False

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The most basic unit of distributed storage in HBase is Region.

• A.True
• B.False

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Flume is used to collect data, and the basic unit of data transmitted by the device is?

• A.Split
• B.Block
• C.Packet
• D.Event

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