What combiners are and when you should use a combiner in a mapreduce job?
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What does a split do?
Explain what are the basic parameters of a mapper?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What are the benefits of Spark over MapReduce?
When is it not recommended to use MapReduce paradigm for large
How to compress mapper output in Hadoop?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
What is the problem with the small file in Hadoop?
What are the advantages of using map side join in mapreduce?
What is the Reducer used for?
Why Mapreduce output written in local disk?
Explain job scheduling through JobTracker
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