In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
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What is the difference between Job and Task in MapReduce?
Define the Use of MapReduce?
How many Mappers run for a MapReduce job?
Explain what combiners are and when you should use a combiner in a mapreduce job?
In MapReduce how to change the name of the output file from part-r-00000?
What are the various InputFormats in Hadoop?
How do you stop a running job gracefully?
How do ‘map’ and ‘reduce’ work?
What are the four basic parameters of a reducer?
Explain what does the conf.setmapper class do?
What is the InputSplit in map reduce ?
What is identity mapper and reducer? In which cases can we use them?
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