What do you mean by data locality?
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What is the role of recordreader in hadoop mapreduce?
What is identity mapper and identity reducer?
How do reducers communicate with each other?
Explain slot in Hadoop Map-Reduce v1?
Which Sorting algorithm is used in Hadoop MapReduce?
Is it possible to rename the output file?
What MapReduce framework consists of?
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How to create a custom key and custom value in MapReduce Job?
how Hadoop is different from other data processing tools?
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Explain job scheduling through JobTracker
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