Detail description of the Reducer phases?
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what are the most common input formats defined in Hadoop?
How can you add the arbitrary key-value pairs in your mapper?
What is identity mapper and chain mapper?
What is MapReduce? What are the syntax you use to run a MapReduce program?
What are the steps involved in MapReduce framework?
how can you check whether Namenode is working beside using the jps command?
what job does the conf class do?
Whether the output of mapper or output of partitioner written on local disk?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What is a Speculative Execution in Hadoop MapReduce?
What do you mean by inputformat?
How to create custom key and custom value in MapReduce Job?