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Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
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More MapReduce Interview Questions
Which Sorting algorithm is used in Hadoop MapReduce?
Explain how mapreduce works.
A number of combiners can be changed or not in MapReduce?
What is shuffling and sorting in Hadoop MapReduce?
Why can aggregation not be done in Mapper in MapReduce?
What is a "reducer" in Hadoop?
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Map reduce jobs take too long. What can be done to improve the performance of the cluster?
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