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Whether the output of mapper or output of partitioner written on local disk?
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What do you mean by data locality?
How to get the single file as the output from MapReduce Job?
What is the use of InputFormat in MapReduce process?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
How to write a custom partitioner for a Hadoop MapReduce job?
What is a partitioner and how the user can control which key will go to which reducer?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What are the fundamental configurations parameters specified in map reduce?
how JobTracker schedules a task ?
Does Partitioner run in its own JVM or shares with another process?
What is sqoop in Hadoop ?
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