What is a Speculative Execution in Hadoop MapReduce?
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What are the main components of MapReduce Job?
Why do we need MapReduce during Pig programming?
What is a IdentityMapper and IdentityReducer in MapReduce ?
What do you know about nlineinputformat?
What is a Distributed Cache in Hadoop?
What is a MapReduce Combiner?
Explain how do ‘map’ and ‘reduce’ work?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
What is KeyValueTextInputFormat in Hadoop MapReduce?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
What are the advantages of using mapreduce with hadoop?
What is the default value of map and reduce max attempts?
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