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Mention Hadoop core components?
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Explain combiners.
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?
Where the mapper's intermediate data will be stored?
What is the input type/format in MapReduce by default?
Differentiate Reducer and Combiner in Hadoop MapReduce?
How to specify more than one directory as input to the MapReduce Job?
Compare Pig vs Hive vs Hadoop MapReduce?
What are the configuration parameters in the 'MapReduce' program?
How does MapReduce framework view its input internally?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
What is MapReduce? What are the syntax you use to run a MapReduce program?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
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