Which of the following descriptions about the characteristics of the real-time data stream processing solution is wrong?

• A.Real-time data requires extremely high analysis and processing speed, so the hardware CPU and memory requirements are very high.
• B.Real-time stream processing is usually achieved through Spark Streaming or F1ink tasks
• C.The scale of data processing is huge, and the data usually does not land.
• D.The data is stored in the memory, without the intervention of a cache system such as Rdis.

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Hive allows users to use SQL statements to query the data stored in the Hadoop cluster.

• A.True
• B.False

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Which of the following components must be relied upon by the HBase service? (Multiple choice)

• A.HDFS
• B.Yern
• C.Zookeeper
• D.MapReduce

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Huawei Cloud GPU-accelerated ECS cloud server uses NVLink technology to achieve optimal multi-card interconnection.

• A.True
• B.False

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What are the commonly used data encryption methods for users? (Multiple choice)

• A.Client side encryption
• B.Apply encryption
• C.Server-side encryption

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