In FusionInsight HD, assuming a topology, spout concurrency is set to 3, bolt1 concurrency is 2, bolt2 concurrency is 3, and the number of workers is 2, then how are bolt1's executors distributed among workers?

• A.Two workers each distribute one
• B.One of the two workers is distributed to two
• C.There is no fixed pattern
• D.Two workers are distributed

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Suppose there is an application that needs to frequently access the user table in the Oracle database. In order to improve performance, Redis is introduced to cache user information.
For this scenario, which of the following is the best data structure choice for Redis?

• A.set
• B.hash
• C.sorted set
• D.list

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In Spark, which statement about broadcast variables is correct?

• A.Broadcast variables are saved in each Task
• B.Broadcast variables are read-only
• C.Broadcast variables are generated by the SparkContext.broadcast() method
• D.The broadcast variable is saved in each Executor

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What distributed computing framework does the FusionInsigt HD big data platform provide? (multiple choice)

• A.Streaming
• B.Spark
• C.HBase
• D.MapReduce

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In Spark, because DataFrame is a higher-level interface than RDD, the call level will be more. Therefore, the performance of all programs developed based on DataFrame will be worse than that of programs developed based on RDD.

• A.True
• B.False

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