Explanation:A RecordReader is little more than an iterator over records, and the map task uses one to generate record key-value pairs, which it passes to the map function. 8. Which of the following is the only way of running mappers ?
A. MapReducer
B. MapRunner
C. MapRed
D. All of the mentioned
Answer:A
Explanation:A RecordReader is little more than an iterator over records, and the map task uses one to generate record key-value pairs, which it passes to the map function. 8. Which of the following is the only way of running mappers ?
A. MapReducer B. MapRunner C. MapRed D. All of the mentioned
Explanation:Having calculated the splits, the client sends them to the jobtracker. 9. _________ is the base class for all implementations of InputFormat that use files as their data source .