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How many Mappers run for a MapReduce job in Hadoop?
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When is the reducers are started in a MapReduce job?
What do you understand by the term Straggler ?
Define speculative execution?
How does Mappers run method works?
In Map Reduce why map write output to Local Disk instead of HDFS?
What is shuffling and sorting in Hadoop MapReduce?
For a Hadoop job, how will you write a custom partitioner?
How many numbers of reducers run in Map-Reduce Job?
Explain about the partitioning, shuffle and sort phase
What are the steps involved in MapReduce framework?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
What is RecordReader in a Map Reduce?
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