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Huawei HCIA-Big Data V3.0 Sample Questions:

1. Which of the following statements about Zookeeper's Leaderi election is correct?

A) When Zookeeperj elects leaderE, it needs more than half of the votes
B) When the number of instances n is an odd number, assuming n=2x+1, it takes x+l votes to become a leader node
C) When the number of instances is 8, it takes 5 votes to become the leader node. The disaster recovery capability is 4
D) When the number of instances n is an odd number, assuming n=2x+1, it takes x votes to become a leader node

2. When a certain task of MapReduce fails, the task can be recalculated through the retry mechanism.

A) TRUE
B) FALSE

3. InHive, which of the following statements about partitions is incorrect?

A) Each partition is a journal
B) There can be further partitions or buckets under the partition
C) The data table can be partitioned by the value of a field
D) The number of partitions is fixed

4. The smallest processing unit of HBase is Region. Where is the routing information between User Region and Region Server stored?

A) Zookeeper
B) Master
C) HDFS
D) meta table

5. In many small file scenarios, Spark will start many tasks. When there is a Shuffle operation in the SQL logic, the number of hash buckets will be greatly increased, which will seriously affect the performance. In Fusioninsight, scenarios for small files usually use the( )Operator to merge partitioni generated by small files in Tabler, reduce the number of partitions, avoid generating too many hash buckets during shuffle, and improve performance?

A) coalosce
B) join
C) group by
D) onnect

Solutions: