How to write a custom partitioner for a Hadoop MapReduce job?
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More MapReduce Interview Questions
Mention Hadoop core components?
What is identity mapper and identity reducer?
How many numbers of reducers run in Map-Reduce Job?
What do you understand by the term Straggler ?
Is it possible to search for files using wildcards?
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What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
when do reducers play their role in a mapreduce task?
what are the most common input formats defined in Hadoop?
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mapper or reducer?
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