Final Quizzes Flashcards
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
