The number of reduces for the job is set by the user via ___________
A)jobconf.setnumtasks(int)
B)jobconf.setnumreducetasks(int)
C)jobconf.setnummaptasks(int)
D)all of the mentioned

Question

The number of reduces for the job is set by the user via ___________  
A)jobconf.setnumtasks(int)
B)jobconf.setnumreducetasks(int)
C)jobconf.setnummaptasks(int)
D)all of the mentioned

Quizplus · Accepted Answer

The number of reducers for a job is set by the user via the method jobconf.setnumreducetasks(int). This method specifically configures the number of reduce tasks for the job. Options A and C are incorrect because they refer to setting the number of tasks in general or map tasks specifically, not reduce tasks. Option D is incorrect because not all the mentioned methods are used to set the number of reduce tasks.

The Number of Reduces for the Job Is Set by the User