In MapReduce, ideally how many mappers should be configured on a slave?
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What is the data storage component used by Hadoop?
What comes in Hadoop 2.0 and MapReduce V2 YARN
Whether the output of mapper or output of partitioner written on local disk?
What is identity mapper and identity reducer?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
When is the reducers are started in a MapReduce job?
Where sorting is done in Hadoop MapReduce Job?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
Can there be no Reducer?
In MapReduce Data Flow, when Combiner is called?
How many Mappers run for a MapReduce job in Hadoop?
A number of combiners can be changed or not in MapReduce?
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