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How to compress mapper output in Hadoop?
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What are the main components of MapReduce Job?
What is the problem with the small file in Hadoop?
how JobTracker schedules a task ?
What are the key differences between Pig vs MapReduce?
What is the role of a MapReduce partitioner?
What is a "map" in Hadoop?
In MapReduce, ideally how many mappers should be configured on a slave?
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?
What combiners is and when you should use a combiner in a MapReduce Job?
Explain task granularity
When is it suggested to use a combiner in a MapReduce job?
What are the various InputFormats in Hadoop?
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