Explain what is “map” and what is "reducer" in hadoop?
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what is the Hadoop MapReduce APIs contract for a key and value class?
Different ways of debugging a job in MapReduce?
Clarify what is shuffling in map reduce?
How data is spilt in Hadoop?
What are the main components of MapReduce Job?
How to create a custom key and custom value in MapReduce Job?
Define the Use of MapReduce?
When is it suggested to use a combiner in a MapReduce job?
What are combiners? When should I use a combiner in my MapReduce Job?
When is it not recommended to use MapReduce paradigm for large
What is the difference between Job and Task in MapReduce?
What is Shuffling and Sorting in a MapReduce?
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