How does MapReduce framework view its input internally?
Developing a MapReduce Application?
What happens when a datanode fails ?
What are combiners? When should I use a combiner in my MapReduce Job?
What platform and Java version is required to run Hadoop?
what job does the conf class do?
What is identity mapper and identity reducer?
Explain the input type/format in mapreduce by default?
What is a map side join?
What are the four essential parameters of a mapper?
In MapReduce, ideally how many mappers should be configured on a slave?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
mapper or reducer?