How many Mappers run for a MapReduce job in Hadoop?
how can you debug Hadoop code?
Can we set the number of reducers to zero in MapReduce?
Explain how mapreduce works.
Define the Use of MapReduce?
what is WebDAV in Hadoop?
What is the need of key-value pair to process the data in MapReduce?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
What is the difference between an RDBMS and Hadoop?
What counter in Hadoop MapReduce?
With the help of two examples name the map and reduce function purpose