Final Quizzes Flashcards
(18 cards)
Your mapper takes one record as input. What would be the possible output pair of the map func to count num of followers per user
follderid , (userid, followerid)
count, followerid
followerid, userid
userid, count (where count =1)
userid, count
how many reducers do you need to complete this calculation
1
consider a combiner that tracks local counts of followers and emits only the local top10 users w/ num of followers, TF: this combiner will be able to improve the performance of the processing
T
consider a combiner that tracks local counts of followers and emits only the local top10 users w/ num of followers, TF: this combiner will be able to generate the correct output
T
consider a combiner that tracks local counts of followers and emits only the local top10 users w/ num of followers, what would be a possible output of the combiner to generate correct results
follderid , (userid, followerid)
count, followerid
followerid, userid
userid, count (where count =1)
userid, count
T/F in above regression momdel, theta 0 and theta 1 are the parameter vectors
t
T/F with above regression model, the weight of the child can be predicted as the value of h_theta (x)
t
t
t
T
f
f
t
f
t
f
f
f
