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What are mapreduce new and old apis while writing map reduce program?. Explain how it works
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How to create custom key and custom value in MapReduce Job?
What is streaming?
What are the various InputFormats in Hadoop?
Explain what does the conf.setmapper class do?
What is the input type/format in MapReduce by default?
What do sorting and shuffling do?
Explain InputSplit in Hadoop MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What is an identity mapper and identity reducer?
What are the main configuration parameters in a MapReduce program?
What main configuration parameters are specified in mapreduce?
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