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What is shuffling in mapreduce?
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What do you understand by the term Straggler ?
Define Writable data types in Hadoop MapReduce?
What is the Job interface in MapReduce framework?
What is the job of blend () and repartition () in Map Reduce?
what is distributed cache in mapreduce framework?
How many Reducers run for a MapReduce job?
What is the need of key-value pair to process the data in MapReduce?
What happens when the node running the map task fails before the map output has been sent to the reducer?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
Can we set the number of reducers to zero in MapReduce?
What is identity mapper and chain mapper?
how can you debug Hadoop code?
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