What is difference between an input split and hdfs block?
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When should you use a reducer?
What is difference between a MapReduce InputSplit and HDFS block
What are the four essential parameters of a mapper?
what is distributed cache in mapreduce framework?
What is the Job interface in MapReduce framework?
How to set mappers and reducers for Hadoop jobs?
Explain what combiners are and when you should use a combiner in a mapreduce job?
Explain job scheduling through JobTracker
In MapReduce how to change the name of the output file from part-r-00000?
How to write a custom partitioner for a Hadoop MapReduce job?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
What is heartbeat in hdfs?
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