In mapreduce what is a scarce system resource? Explain?
mapper or reducer?
What is LazyOutputFormat in MapReduce?
What is the default input type in MapReduce?
What is the role of a MapReduce partitioner?
What is the need of MapReduce in Hadoop?
Is it mandatory to set input and output type/format in MapReduce?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
Clarify what is shuffling in map reduce?
What is a RecordReader in Hadoop MapReduce?
how can you check whether Namenode is working beside using the jps command?
Explain the process of spilling in Hadoop MapReduce?
What is Reduce only jobs?