What is shuffleing in mapreduce?
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Explain what are the basic parameters of a mapper?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
How many Mappers run for a MapReduce job in Hadoop?
Explain about the basic parameters of mapper and reducer function
What is SequenceFileInputFormat?
What do you know about nlineinputformat?
What are the steps involved in MapReduce framework?
What is heartbeat in hdfs?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
Describe what happens to a mapreduce job from submission to output?
What is shuffling and sorting in mapreduce?
Why can aggregation not be done in Mapper in MapReduce?
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