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how JobTracker schedules a task ?
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How to specify more than one directory as input to the MapReduce Job?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
How to submit extra files(jars, static files) for MapReduce job during runtime?
How does MapReduce framework view its input internally?
Explain what is shuffling in mapreduce?
What is mapper in map reduce?
Is it mandatory to set input and output type/format in MapReduce?
When is the reducers are started in a MapReduce job?
What is heartbeat in hdfs? Explain.
what is storage and compute nodes?
What is the relationship between Job and Task in Hadoop?
What is a combiner and where you should use it?
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