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Define the purpose of the partition function in mapreduce framework
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What is a MapReduce Combiner?
What is shuffling in mapreduce?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
Which are the methods in the mapper interface?
What is the default input type in MapReduce?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
How to set which framework would be used to run mapreduce program?
Compare Pig vs Hive vs Hadoop MapReduce?
What is the key- value pair in Hadoop MapReduce?
What is heartbeat in hdfs? Explain.
What is the next step after Mapper or MapTask?
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