what are the basic parameters of a Mapper?
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When is the reducers are started in a MapReduce job?
How many Reducers run for a MapReduce job?
Explain JobConf in MapReduce.
What are the main components of MapReduce Job?
What is partitioning in MapReduce?
What do you mean by inputformat?
What happens when a datanode fails ?
Explain the Reducer's reduce phase?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
What is the difference between a MapReduce InputSplit and HDFS block?
What is Shuffling and Sorting in a MapReduce?
What is Data Locality in Hadoop?
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