what is "map" and what is "reducer" in Hadoop?
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What platform and Java version is required to run Hadoop?
Why Mapreduce output written in local disk?
Can we submit the mapreduce job from slave node?
What is heartbeat in hdfs? Explain.
How to set which framework would be used to run mapreduce program?
With the help of two examples name the map and reduce function purpose
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
How hadoop mapreduce works?
What is Hadoop Map Reduce ?
How many InputSplits is made by a Hadoop Framework?
In MapReduce Data Flow, when Combiner is called?
What is the need of key-value pair to process the data in MapReduce?