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What is MapReduce?
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Answer / bindu
It is data processing layer of hadoop.map and reduce are the two tasks for processing data in hadoop.
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What are ‘maps’ and ‘reduces’?
Difference between mapreduce and spark
It can be possible that a Job has 0 reducers?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
What is the data storage component used by Hadoop?
What are the disservices of utilizing Apache Spark over Hadoop MapReduce?
What is sqoop in Hadoop ?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
what does the conf.setMapper Class do ?
What is the default input type in MapReduce?
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