What are the data components used by Hadoop?
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Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
What do you mean by inputformat?
What is the need of key-value pair to process the data in MapReduce?
How to create a custom key and custom value in MapReduce Job?
When is it suggested to use a combiner in a MapReduce job?
how can you debug Hadoop code?
Explain JobConf in MapReduce.
What are the advantages of using map side join in mapreduce?
mapper or reducer?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
Explain InputSplit in Hadoop MapReduce?
Can you tell us how many daemon processes run on a hadoop system?
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