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What are the steps involved in MapReduce framework?
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How to create a custom key and custom value in MapReduce Job?
What is the Hadoop MapReduce API contract for a key and value Class?
What is difference between an input split and hdfs block?
Explain the process of spilling in MapReduce?
How data is spilt in Hadoop?
How do reducers communicate with each other?
Why is output file name in Hadoop MapReduce part-r-00000?
What happens when a DataNode fails during the write process?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
What is shuffling in mapreduce?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
Why can aggregation not be done in Mapper in MapReduce?
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