What combiners are and when you should utilize a combiner in a map reduce job?
What is the need of key-value pair to process the data in MapReduce?
What is shuffling and sorting in mapreduce?
How to specify more than one directory as input to the MapReduce Job?
What is the use of InputFormat in MapReduce process?
Why Hadoop MapReduce?
What is a Speculative Execution in Hadoop MapReduce?
What is the difference between Job and Task in MapReduce?
what is Speculative Execution?
What platform and Java version is required to run Hadoop?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
How many times combiner is called on a mapper node in Hadoop?
What are the four basic parameters of a reducer?