Regarding RDD, which of the following statements is wrong?

• A.RDD is a read-only, partitionable distributed dataset
• B.RDD has a lineage mechanism (Lineage)
• C.RDD is Spark's abstraction of underlying data
• D.RDDs are stored on disk by default

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What data does Fusion Insight Manager back up regularly? (Multiple choice)

• A.LDAPServer
• B.NameNode
• C.OMS
• D.DBService

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Which of the following is not included in the scheme authentication method of Zookeeper?

• A.world
• B.sasl
• C.auth
• D.digest

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Redis adopts a non-central self-organizing structure. Nodes use the Gossip protocol to exchange node status information.

• A.FALSE
• B.TRUE

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A typical Katka cluster contains several Producers, several Brokers, several Consumers and a ZooKeeper cluster.

• A.False
• B.True

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