Q7 Single choice Mark for later What happens in a MapReduce job when you set the number of reducers to zero? A No reducer executes, but the mappers generate no output. B No reducer executes, and the output of each mapper is written to a separate file in HDFS. C No reducer executes, but the outputs of all the mappers are gathered together and written to a single file in HDFS. D Setting the number of reducers to zero is invalid, and an exception is thrown. Correct answer