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What are ‘maps’ and ‘reduces’?
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More MapReduce Interview Questions
Illustrate a simple example of the working of MapReduce.
Explain what does the conf.setmapper class do?
What are the main configuration parameters in a MapReduce program?
How many Reducers run for a MapReduce job?
Mention what is the next step after mapper or maptask?
Can there be no Reducer?
What comes in Hadoop 2.0 and MapReduce V2 YARN
When should you use a reducer?
How hadoop mapreduce works?
When is it not recommended to use MapReduce paradigm for large scale data processing?
How much space will the split occupy in Mapreduce?
In Hadoop what is InputSplit?
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