What is an identity mapper and identity reducer?
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What is Distributed Cache in the MapReduce Framework?
What are combiners? When should I use a combiner in my MapReduce Job?
Can we set the number of reducers to zero in MapReduce?
What happens when a datanode fails ?
What do you understand by the term Straggler ?
how JobTracker schedules a task ?
What combiners is and when you should use a combiner in a MapReduce Job?
What is MapReduce?
What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?
When Namenode is down what happens to job tracker?
What is Counter in MapReduce?
Explain the process of spilling in Hadoop MapReduce?