How many Reducers run for a MapReduce job in Hadoop?
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What happens when the node running the map task fails before the map output has been sent to the reducer?
What is Distributed Cache in the MapReduce Framework?
Compare Pig vs Hive vs Hadoop MapReduce?
What is the need of MapReduce in Hadoop?
What is a TaskInstance?
What is the problem with the small file in Hadoop?
What do you know about nlineinputformat?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
Which Sorting algorithm is used in Hadoop MapReduce?
Mention what is the hadoop mapreduce apis contract for a key and value class?
Name job control options specified by mapreduce.
What is identity mapper and identity reducer?
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