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Explain the differences between a combiner and reducer
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Explain what is “map” and what is "reducer" in hadoop?
What is the difference between Hadoop and RDBMS?
mapper or reducer?
With the help of two examples name the map and reduce function purpose
How to get the single file as the output from MapReduce Job?
how Hadoop is different from other data processing tools?
Can we submit the mapreduce job from slave node?
Explain about the basic parameters of mapper and reducer function
What do you mean by shuffling and sorting in MapReduce?
What are the four basic parameters of a reducer?
How to create custom key and custom value in MapReduce Job?
when do reducers play their role in a mapreduce task?
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