Is it mandatory to set input and output type/format in MapReduce?


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More MapReduce Interview Questions

What are mapreduce new and old apis while writing map reduce program?. Explain how it works

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What is a "reducer" in Hadoop?

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What is heartbeat in hdfs? Explain.

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Explain the difference between a MapReduce InputSplit and HDFS block?

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How to get the single file as the output from MapReduce Job?

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Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

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When should you use a reducer?

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What are the steps involved in MapReduce framework?

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What is the input type/format in MapReduce by default?

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How to specify more than one directory as input to the MapReduce Job?

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What are the various configuration parameters required to run a mapreduce job?

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Why MapReduce uses the key-value pair to process the data?

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