Where is Mapper output stored?
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How to create custom key and custom value in MapReduce Job?
Why do we need MapReduce during Pig programming?
When the reducers are are started in a mapreduce job?
When should you use a reducer?
Illustrate a simple example of the working of MapReduce.
Detail description of the Reducer phases?
What is heartbeat in hdfs?
What is OutputCommitter?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
How do Hadoop MapReduce works?
What is the key- value pair in MapReduce?
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