Q. In Hadoop MapReduce, when is the output of the reduce() function written to the distributed file system?

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Q. What is the purpose of the copy phase in reduce tasks?

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Q. When does a map task write its partial output data to disk?

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Q. What is the purpose of the circular memory buffer in a map task?

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Q. What is the role of splits in the MapReduce process?

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Q. How does HDFS ensure fault tolerance for data blocks?

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Q. What is the purpose of the replication factor in HDFS?

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Q. What is the default block size in HDFS?

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Q. What is the role of the namenode in HDFS?

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Q. What is the primary design goal of the Hadoop Distributed File System (HDFS)?

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Q. Why does the Hadoop master represent a single point of failure?

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Q. What is the default number of map and reduce slots on a tasktracker in Hadoop?

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Q. How does the jobtracker divide input data in a Hadoop MapReduce cluster?

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Q. In a MapReduce job, what is the unit of work that users submit to the jobtracker?

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Q. What is the role of the master node in a Hadoop MapReduce cluster?

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Q. What is the primary purpose of the HBase database?

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Q. What is the key advantage of Hadoop's distributed file system, HDFS?

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Q. How does Skynet handle worker node failures in its MapReduce implementation?

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Q. What is the primary language used for writing MapReduce programs in Disco?

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Q. Which of the following companies was one of the early adopters of Hadoop, using it to generate their search index?

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