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Why MapReduce uses the key-value pair to process the data?
What is the process of changing the split size if there is limited storage space on Commodity Hardware?
What is the data storage component used by Hadoop?
What is a TaskInstance?
What do you know about nlineinputformat?
What is the need of MapReduce in Hadoop?
what is storage and compute nodes?
Why can aggregation not be done in Mapper in MapReduce?
What are the four essential parameters of a mapper?
Define the purpose of the partition function in mapreduce framework
What happens when a datanode fails ?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
What combiners are and when you should utilize a combiner in a map reduce job?
How can we assure that the values regarding a particular key goes to the same reducer?
What are the benefits of Spark over MapReduce?
