What is shuffling and sorting in mapreduce?
How can we assure that the values regarding a particular key goes to the same reducer?
Is it possible to rename the output file?
Explain InputSplit in Hadoop MapReduce?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
Mention what is the next step after mapper or maptask?
Which are the methods in the mapper interface?
What is identity mapper and identity reducer?
What do you understand by the term Straggler ?
How to set the number of mappers for a MapReduce job?
How to create custom key and custom value in MapReduce Job?
What is Output Format in MapReduce?