In FusionInsight HD, which of the following are the configuration items of Oozie's MapReduce Action? (multiple choice)

Question

Options

• Aname-node
• Bsource
• Cmapred.mapper.class
• Djob-tracker

• A
  84% (49)
• B
  16% (9)

Explanation

In Oozie's MapReduce Action, name-node (A) and job-tracker (D) are required XML elements that identify the HDFS NameNode and the YARN ResourceManager (historically the JobTracker), respectively - Oozie needs both to locate the cluster and submit the job. mapred.mapper.class (C) is a valid configuration property set inside the <configuration> block of the action to specify which Mapper class to run.

Option B (source) is incorrect - it is not a recognized element in the Oozie MapReduce Action schema. "Source" appears in tools like Kafka connectors or data pipeline definitions, not in Oozie workflow XML.

Memory tip: Think of the three correct answers as covering the three "W's" of running a MapReduce job - Where is the data? (name-node), Where does the job run? (job-tracker), and What does it do? (mapred.mapper.class). Anything else that sounds like a data-pipeline keyword (like source) is a red herring.

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