How can you add the arbitrary key-value pairs in your mapper?
How to create a custom key and custom value in MapReduce Job?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
Explain about the partitioning, shuffle and sort phase in MapReduce?
What is a combiner and where you should use it?
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
What is a TaskInstance?
What is the role of a MapReduce partitioner?
What is the key- value pair in Hadoop MapReduce?
What is sqoop in Hadoop ?
What do you know about nlineinputformat?
Which are the methods in the mapper interface?
What is partitioner and its usage?