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INT303 Big Data Analytics - Final Exam: Question 5: MapReduce

INT303 Big Data Analytics - Final Exam: Question 5: MapReduce

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5. [MapReduce] Determine whether the following statements are true or false. Please remember to justify your answers briefly. CourseNana.COM

(a) Each mapper/reducer must generate the same number of output key/value pairs as it receives on the input. (3 Marks) CourseNana.COM

(b) The output type of keys/values of mappers/reducers must be of the same type as their input. (3 Marks) CourseNana.COM

(c) The inputs to reducers are grouped by key. (3 Marks) CourseNana.COM

(d) It is possible to start reducers while some mappers are still running. (3 Marks) CourseNana.COM

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