what is chain reducer

mapreduce interview questions and answers 9
A few of the hadoop Mapreduce Interview questions and answers are presented in this post. These are suitable for both beginners and experienced mapreduce developers. Mapreduce Interview Questions and Answers for Freshers: 1.  What is Mapreduce ? Mapreduce is a framework for processing  big data (huge data sets using a large […]

50 Mapreduce Interview Questions and Answers Part – 1

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Hadoop provided some predefined Mapper and Reducer classes in its Java API and these will be helpful in writing simple or default mapreduce jobs. A few among the entire list of predefined mapper and reducer classes are provided below. Identity Mapper Identity Mapper is the default Mapper class provided by […]

Predefined Mapper and Reducer Classes