INF2603 Assignment 2 (COMPLETE ANSWERS) 2024 (286114) - DUE 27 September 2024
INF2603 Assignment 2 (COMPLETE ANSWERS) 2024 (286114) - DUE 27 September 2024
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University of South Africa
INF2603
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QUESTION 1 [20 marks] Carefully select the most correct
answer to each of the following questions. Please write down
only the question number and corresponding to it put the
correct option’s number (e.g. Qu. 11. (e)): For question 1 to 5:
Indicate whether the statement is true or false. (2 marks each):
1. Overlapping subtypes are subtypes that contain nonunique
subsets of the supertype entity set; that is, each entity instance
of the supertype may appear in more than one subtype. a. True
b. False 2. Within a specialisation hierarchy, every subtype can
have many supertypes to which it is directly related. a. True b.
False 3. If Capricon TVET College had some departments that
were classified as “research only,” they would not offer courses;
therefore, the COURSE entity would be independent to the
DEPARTMENT entity. a. True b. False 4. A cloud database is a
database that is built, deployed, and accessed in a cloud
environment, such as a private, public, or hybrid cloud. a. True
b. False 5. The multivalued type of attribute cannot be created
in a DBMS. a. True b. False 3 INF2603 OCTOBER/NOVEMBER
2024 TURN OVER For question 6 to 10: Identify the choice that
best completes the statement or answer the question. (2 marks
each): a. CHECK b. HAVING c. EXISTS d. UPDATE e. LIKE 6.
Validates data in an attribute. 7. Checks whether a subquery
, returns any rows. 8. Restricts the selection of grouped rows
based on a condition. 9. Modifies an attribute’s values in one or
more table’s rows. 10. Checks whether an attribute value
matches a given string pattern
1 (a) True
2 (b) False
3 (a) True
4 (a) True
5 (b) False
6 (a) CHECK
7 (c) EXISTS
8 (b) HAVING
9 (d) UPDATE
10 (e) LIKE
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