How to create a custom key and custom value in MapReduce Job?
Difference between mapreduce and spark
Is it necessary to write a mapreduce job in java?
What is a "map" in Hadoop?
Explain JobConf in MapReduce.
What is shuffleing in mapreduce?
A number of combiners can be changed or not in MapReduce?
What is shuffling and sorting in Hadoop MapReduce?
Describe what happens to a mapreduce job from submission to output?
how can you debug Hadoop code?
Is YARN a replacement of Hadoop MapReduce?
What is a combiner and where you should use it?
Can you tell us how many daemon processes run on a hadoop system?