How many numbers of reducers run in Map-Reduce Job?
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A number of combiners can be changed or not in MapReduce?
What is the need of key-value pair to process the data in MapReduce?
Define speculative execution?
What combiners is and when you should use a combiner in a MapReduce Job?
What is a "map" in Hadoop?
What is the difference between Job and Task in MapReduce?
What is Distributed Cache in the MapReduce Framework?
what does the conf.setMapper Class do ?
Explain combiners.
How many Mappers run for a MapReduce job?
What is the role of recordreader in hadoop mapreduce?
What do you understand by compute and storage nodes?