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How to set the number of mappers for a MapReduce job?
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How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?
Explain how mapreduce works.
Which Sorting algorithm is used in Hadoop MapReduce?
What is a "reducer" in Hadoop?
Explain the difference between a MapReduce InputSplit and HDFS block?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
Can we set the number of reducers to zero in MapReduce?
What is the key- value pair in MapReduce?
What is difference between a MapReduce InputSplit and HDFS block
How does fault tolerance work in mapreduce?
Why Mapreduce output written in local disk?
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