A number of combiners can be changed or not in MapReduce?
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How to create a custom key and custom value in MapReduce Job?
It can be possible that a Job has 0 reducers?
What are the various input and output types supported by mapreduce?
Mention what is the hadoop mapreduce apis contract for a key and value class?
When is the reducers are started in a MapReduce job?
How many Mappers run for a MapReduce job in Hadoop?
Is it possible to search for files using wildcards?
Developing a MapReduce Application?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
How to create custom key and custom value in MapReduce Job?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
how to proceed to write your first mapreducer program?
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