Kerberos can only provide security authentication for services within the cluster.

• A.False
• B.True

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Which of the following descriptions of Kafka partition offset is incorrect?

• A.Consumers track records through (offset, partition, topic)
• B.The position of each message in the file is called offset (offset)
• C.Uniquely mark a message
• D.offset is a String type string

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In the MRS service, the unavailability of the Zookeeper service will lead to the unavailability of the kafka service.

• A.True
• B.False

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Comparing Spark and MapReducei, which of the following statements are correct?

• A.Intermediate results of Spark tasks can only be stored in memory
• B.Shuffle is not a necessary process in Spark tasks
• C.Shuffle is a necessary process in Spark tasks
• D.Spark can cache intermediate results in memory reducing disk I0

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Regarding the order of the YARN scheduler allocating resources, which one of the following descriptions is correct?

• A.Same rack -> any machine -> local resource
• B.Local resources -> same rack -> any machine
• C.Any machine -> same rack -> local resource
• D.Any machine -> local resource -> same rack

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