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What is the difference between HDFS block and input split?
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What is shuffleing in mapreduce?
What is the default value of map and reduce max attempts?
What is heartbeat in hdfs? Explain.
What do you mean by inputformat?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
Does Partitioner run in its own JVM or shares with another process?
Clarify what is shuffling in map reduce?
What happen if the number of the reducer is 0 in MapReduce?
Where sorting is done on mapper node or reducer node in MapReduce?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
What main configuration parameters are specified in mapreduce?
What platform and Java version is required to run Hadoop?
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