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Huawei HCIA-Big Data V2.0 Sample Questions:

1. Hive log collection on Fusionlnsight HD Manager interface, which option is incorrect?

A) You can specify an instance for log collection, such as specifying that the MetaStore logs are collected separately
B) can specify that the user logs into the log collection, for example, only download logs generated by userA user
C) You can specify the node IP for log collection, such as downloading only the logs of a certain IP
D) Log collection can be specified for a period of time, for example, only records of 2016-1-1> 2016-1-10

2. If there are only Default, QueueA, and QueueB subqueues in the YARN cluster, then their capacity can be set to 60%, 25%, and 22%, respectively.

A) False
B) True

3. A cluster in the Fusionlnsight HD system can manage multiple tasks, each service can manage multiple roles, and each role can manage only one instance.

A) False
B) True

4. Is the Loader job description in Fusioninsight HD correct?

A) After Loader submits the job to Yam for execution, if a Mappe task fails to execute, it can retry by itself.
B) After Loader submits a job to Yarn for execution, it cannot submit other jobs until the job is completed.
C) After the Loader job fails to execute, garbage data will be generated, which requires the user to remove the residue manually.
D) After Loader submits the job to Yam for execution, if the Loader service is abnormal at this time, the job execution fails.

5. After submitting the topology using the Streaming client shell command in the Fusionlnsight HD system, use Storm and UI to check and find that the topology has not processed data for a long time. What are the reasons?

A) SupeMsor's slots resource is exhausted. After the topology is submitted, the slot cannot be allocated to start the Worker process
B) There is a logic error in the topology service, and it cannot run normally after submission
C) The topology is too complex or too concurrency, which causes the worker startup time to be too long, exceeding the wait time of supeMsor
D) When the amount of data is large, the topology processing speed is slow

Solutions: