What are mapreduce new and old apis while writing map reduce program?. Explain how it works
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What are the advantages of using mapreduce with hadoop?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
How do Hadoop MapReduce works?
Explain combiners.
Explain what is shuffling in mapreduce?
What is the best way to copy files between HDFS clusters?
What is heartbeat in hdfs? Explain.
What is a distributed cache in mapreduce framework?
What is the function of mapreducer partitioner?
What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?
What is the need of MapReduce in Hadoop?
What is shuffling in mapreduce?
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