Does changing the number of mappers in the control arguments vary the output for each new number of mappers? If so, how to choose the correct number mappers during the exam?
Also, How should we decide if the num mappers have to be kept more than one in which case again, how to select a primary key for split by? Will this information be provided during the certification? I believe that the describe table command using sqoop eval could be useful to identify the primary key upon which we can split. Correct me if my approach is wrong.