What is Shuffling and Sorting in a MapReduce?
What are the four basic parameters of a reducer?
Is reduce-only job possible in Hadoop MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
What is the difference between an RDBMS and Hadoop?
What is the Reducer used for?
How to create a custom key and custom value in MapReduce Job?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
what is storage and compute nodes?
how can you check whether Namenode is working beside using the jps command?
Define speculative execution?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
Differentiate Reducer and Combiner in Hadoop MapReduce?