Question

Map output larger than ___________ percent of the memory allocated to copying map outputs.

(a) 10

(b) 15

(c) 25

(d) 35

The question was asked in an international level competition.

This intriguing question comes from MapReduce Features in division Developing a MapReduce Application of Hadoop

Answer 1

The correct option is (c) 25

The best I can explain: Map output will be written directly to disk without first staging through memory.