Is it possible to split 100 lines of input as a single split in MapReduce?
What counter in Hadoop MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
How to set the number of reducers?
In mapreduce what is a scarce system resource? Explain?
what is Speculative Execution?
What is the need of MapReduce?
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
What is the Reducer used for?
What do you understand by mapreduce?
When is it not recommended to use MapReduce paradigm for large scale data processing?
Compare RDBMS with Hadoop MapReduce.