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Huawei HCIA-Big Data V3.0 Sample Questions:

1. Which description about HIVE is incorrect?

A) Hive is built on top of Hadoop based on static batch processing, Hadoop usually has high latency andC. A lot of overhead is required for committing and scheduling
B) The best use case for Hive is batch jobs with large datasets
C) The Hive query operation process strictly follows the function execution model of Hadoop MapReduce. Hive converts the user's HiveQL statement into Map through the interpreter Reduce on Hadoop cluster
D) Hive can realize low-latency and fast query on large-scale data sets

2. The figure below shows the configuration of HDFS tiered storage. If the number of copies of a block is 4. Which of the following statements is wrong?

A) If the first block copy is written to RAM_If DISK fails, try to write to the storage type specified by "Alternative Storage Policy"
B) If it is a copy other than the first copy that fails to write, try to write to the storage type specified by "Alternative storage policy for copy"
C) All 4 blocks will be written to RAM_DISK
D) The first block copy will be written to RAM_DISK, the rest of the replicas are written to DISK

3. The UNION ALL operator in Hive is used to combine the result sets of two more SELECT statements. Duplicate values are not allowed in the result set.

A) True
B) False

4. As shown in the figure, the following description of the message read by the Kafka message consumer Consumeri is wrong?

A) Consumers read messages sequentially from right to left.
B) Consumert uses offset to record the position of the read
C) The blue in the picture is a topic of Kafkal, which can be understood as a queue, and each grid represents a message.
D) The messages generated by the producer are placed at the end of the topic one by one.

5. Fusioninsight HD Manager interface Hive log collection. Which option is incorrect?

A) The node IP can be specified for log collection, for example, only the logs of a certain IP can be downloaded
B) You can specify an instance for log collection, such as specifying a separate collection of MetaStorel logs
C) You can specify a time period for log collection, for example, only collect logs from 2016-1-1 to 2016-140
D) A specific user can be specified for log collection, for example, only the logs generated by userA can be downloaded

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