1.

Mention the core methods of Reducer.

Answer»

The core methods of a REDUCER are:

  • setup(): setup is a method CALLED just to configure different parameters for the reducer.
  • reduce(): reduce is the primary operation of the reducer. The specific function of this method includes DEFINING the TASK that has to be worked on for a DISTINCT set of values that share a key.
  • cleanup(): cleanup is used to clean or delete any temporary files or data after performing reduce() task.


Discussion

No Comment Found

Related InterviewSolutions