UNIVERSITY EXAMINATIONS: 2020/2021
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
APPLIED COMPUTING
BAC 3101: RECOMMENDER SYSTEMS
FULL TIME /PART TIME
ORDINARY EXAMINATION
DATE: DECEMBER, 2021 TIME: 2 HOURS
INSTRUCTIONS: Question ONE is Compulsory, Choose TWO OTHER Questions.
QUESTION ONE (20 Marks) Compulsory
a) Define the following terms as used in recommender systems [2 Marks]
i). Implicit rating
ii). Explicit rating
b) Discuss the main differences between parallelized hybridization design and pipelined
hybridization design [4 Marks]
c) In which scenarios would location play an important role in the recommendation process?
[4 Marks]
d) Describe two challenges associated with the collaborative filtering technique [4 Marks]
e) Discuss three data and knowledge sources for recommender systems. [6 Marks]
QUESTION TW0 (15 marks)
Discuss two problems associated with recommender systems [5 Marks]
As with all systems, recommender systems are prone to attacks. Discuss Five attacks that can be
carried out on recommender systems. [10 Marks]
QUESTION THREE (15 marks)
In the implementation of a recommender system, various activities are performed. Using a
relevant example, discuss what is involved in the integration phase of the recommender system
with the organization’s business system. [5 Marks]
You have been contracted by KCA university to advise the marketing team on how they can
increase the number of students enrolling for the professional courses. Justify with the use of
relevant examples why a recommender system would be of use to the department. [10 Marks]
QUESTION FOUR (15 marks)
Discuss how recommender systems have enhanced experiences in the following contexts. In
each case, use a relevant example [15 Marks]
i). News and Entertainment websites
ii). Online Shopping
iii). Telco Industry
