Explain what does the conf.setMapper Class do in MapReduce?
Explain the process of spilling in Hadoop MapReduce?
When should you use a reducer?
What are the key differences between Pig vs MapReduce?
What is Combiner in MapReduce?
How do ‘map’ and ‘reduce’ work?
How to write a custom partitioner for a Hadoop MapReduce job?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
Explain what is “map” and what is "reducer" in hadoop?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
Mention Hadoop core components?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
Explain the Reducer's reduce phase?