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When the reducers are are started in a mapreduce job?
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How many Mappers run for a MapReduce job?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
How to write MapReduce Programs?
What is a partitioner and how the user can control which key will go to which reducer?
how can you debug Hadoop code?
What happens when the node running the map task fails before the map output has been sent to the reducer?
Explain about the partitioning, shuffle and sort phase in MapReduce?
How to write a custom partitioner for a Hadoop MapReduce job?
Explain job scheduling through JobTracker
How many Reducers run for a MapReduce job?
Mention what is the hadoop mapreduce apis contract for a key and value class?
What are the various input and output types supported by mapreduce?
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