What is map/reduce job in hadoop?
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More MapReduce Interview Questions
What is the need of MapReduce?
With the help of two examples name the map and reduce function purpose
What combiners are and when you should use a combiner in a mapreduce job?
Write a short note on the disadvantages of mapreduce
Is it possible to search for files using wildcards?
What is heartbeat in hdfs? Explain.
What is the relation between MapReduce and Hive?
In Map Reduce why map write output to Local Disk instead of HDFS?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
How to set mappers and reducers for MapReduce jobs?
How to optimize Hadoop MapReduce Job?
Explain the differences between a combiner and reducer
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