Is there any point of learning mapreduce, then?
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Write a short note on the disadvantages of mapreduce
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What is Mapper in Hadoop MapReduce?
How do reducers communicate with each other?
What happens when a DataNode fails during the write process?
What are the main configuration parameters in a MapReduce program?
What is the core of the job in MapReduce framework?
What is the key- value pair in MapReduce?
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Explain what does the conf.setMapper Class do in MapReduce?
What is heartbeat in hdfs? Explain.
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