What is the need of key-value pair to process the data in MapReduce?
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What is the default value of map and reduce max attempts?
Why can aggregation not be done in Mapper in MapReduce?
Where is Mapper output stored?
Why is output file name in Hadoop MapReduce part-r-00000?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
Explain what is shuffling in mapreduce?
what job does the conf class do?
How to submit extra files(jars, static files) for MapReduce job during runtime?
How can we assure that the values regarding a particular key goes to the same reducer?
Mention when to use Map reduce mode?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
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