What is a MapReduce Combiner?
What is the role of a MapReduce partitioner?
what are the three modes in which Hadoop can be run?
What is RecordReader in a Map Reduce?
How to create a custom key and custom value in MapReduce Job?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
How to set the number of reducers?
What is a TaskInstance?
What combiners is and when you should use a combiner in a MapReduce Job?
Explain the Reducer's Sort phase?
What is identity mapper and chain mapper?
What main configuration parameters are specified in mapreduce?
What is a map side join?