Detail description of the Reducer phases?
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How many Mappers run for a MapReduce job in Hadoop?
What happens when a DataNode fails during the write process?
What is mapreduce algorithm?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
Explain the Reducer's reduce phase?
Why do we need MapReduce during Pig programming?
Differentiate Reducer and Combiner in Hadoop MapReduce?
Is it possible to search for files using wildcards?
What is the key- value pair in Hadoop MapReduce?
Is reduce-only job possible in Hadoop MapReduce?
What is Hadoop Map Reduce ?
What is RecordReader in a Map Reduce?
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