What is the difference between RDBMS with Hadoop MapReduce?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
What is the process of changing the split size if there is limited storage space on Commodity Hardware?
Can you tell us how many daemon processes run on a hadoop system?
What is the default input type in MapReduce?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
Explain what you understand by speculative execution
What happens when a DataNode fails during the write process?
How to change a number of mappers running on a slave in MapReduce?
what is NameNode in Hadoop?
What counter in Hadoop MapReduce?
What is partitioner and its usage?
Define MapReduce?
Explain what is distributed cache in mapreduce framework?