Clarify what combiners are and when you should utilize a combiner in a map reduce job?
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What are ‘reduces’?
What combiners is and when you should use a combiner in a MapReduce Job?
How to set the number of reducers?
What can be optimum value for Reducer?
What is the function of mapreducer partitioner?
what is NameNode in Hadoop?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
Why comparison of types is important for MapReduce?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
What happens when a datanode fails ?
mapper or reducer?
In MapReduce how to change the name of the output file from part-r-00000?