Explain InputSplit in Hadoop MapReduce?
What is the need of key-value pair to process the data in MapReduce?
How to get the single file as the output from MapReduce Job?
Developing a MapReduce Application?
What is Output Format in MapReduce?
Where sorting is done on mapper node or reducer node in MapReduce?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
Explain task granularity
What is KeyValueTextInputFormat in Hadoop MapReduce?
What is a combiner and where you should use it?
How to write a custom partitioner for a Hadoop MapReduce job?
With the help of two examples name the map and reduce function purpose