I was looking into a question in document spark-certification-study-guide.pdf. I felt the answer key to this question is wrong. Could somebody please confirm what i think is right?
6. Given the pair RDD country that contains tuples of the form ((Country, count)),
which of the following is used to get the country with the lowest number of
refugees in Scala?
a) val low = country.sortByKey().first
b) val low = country.sortByKey(false).first
c) val low = country.map(x=>(x._2,x._1)).sortByKey().first
d) val low = country.map(x=>(x._2,x._1)).sortByKey(false).first
Answer key says D is correct. I feel it should be C. I am worried i have undertood things wrong here. Please correct.