Free CCD-470 Web TestEngine Demo

Q9 Single choice

If you run the word count MapReduce program with m mappers and r reducers, how many output files will you get at the end of the job? And how many key-value pairs will there be in each file? Assume k is the number of unique words in the input files.

A
There will be r files, each with exactly k/r key-value pairs.
B
There will be r files, each with approximately k/m key-value pairs.
C
There will be r files, each with approximately k/r key-value pairs.
D
There will be m files, each with exactly k/m key value pairs.
E
There will be m files, each with approximately k/m key-value pairs.

CCD-470 Web TestEngine demo