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How many Reducers run for a MapReduce job?


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More MapReduce Interview Questions

what is "map" and what is "reducer" in Hadoop?

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What is the use of InputFormat in MapReduce process?

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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Why can aggregation not be done in Mapper in MapReduce?

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When should you use sequencefileinputformat?

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Is reduce-only job possible in Hadoop MapReduce?

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Why is Apache Spark faster than Hadoop MapReduce?

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A number of combiners can be changed or not in MapReduce?

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Is it important for Hadoop MapReduce jobs to be written in Java?

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how JobTracker schedules a task ?

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What is a Distributed Cache in Hadoop?

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Compare RDBMS with Hadoop MapReduce.

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