Explain slot in Hadoop Map-Reduce v1?
how can you debug Hadoop code?
How to write MapReduce Programs?
What is the Reducer used for?
What is the best way to copy files between HDFS clusters?
Explain about the basic parameters of mapper and reducer function
What is a mapreduce algorithm?
How do reducers communicate with each other?
What is the need of MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
What is the relationship between Job and Task in Hadoop?
What is shuffling in mapreduce?
What do sorting and shuffling do?