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INF2603_Assessment_5_Answers
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Assessment 5: Attempt review https://mymodules.dtls.unisa.ac.za/mod/quiz/review.php?attempt=190UNISA 2024 INF2603-24-Y Welcome Message Assessment 5
QUIZ
Started on Friday, 10 May 2024, 11:30 AM
State Finished
Completed on Friday, 10 May 2024, 11:58 AM
Time taken 28 mins 33 secs
Grade 18.00 out of 20.00 (90%)
Question 1
Correct
Mark 1.00 out of 1.00
The _____ constraint can be placed on a column to ensure that every row in the
table has a value for that column.
a. UNIQUE
b. NOT NULL
c. VALUE
d. EMPTY
The correct answer is: NOT NULL
Question 2
Correct
Mark 1.00 out of 1.00
_____ logic, used extensively in mathematics, provides a framework in which an
assertion (statement of fact) can be veri�ed as either true or false.
a. Predicate
b. Database
c. Relational
d. Index
The correct answer is: Predicate
1 of 7 2024/05/10, 11
,Assessment 5: Attempt review https://mymodules.dtls.unisa.ac.za/mod/quiz/review.php?attempt=190
Question 3
Correct
Mark 1.00 out of 1.00
The _____ relationship should be rare in any relational database design.
a. 1:1
b. 1:M
c. M:1
d. M:N
The correct answer is: 1:1
Question 4
Correct
Mark 1.00 out of 1.00
_____ returns only the attributes requested, in the order in which they are
requested.
a. PROJECT
b. SELECT
c. UNION
d. DIFFERENCE
The correct answer is: PROJECT
Question 5
Incorrect
Mark 0.00 out of 1.00
A _____ is any key that uniquely identi�es each row.
a. superkey
b. special key
c. foreign key
d. candidate key
The correct answer is: superkey
2 of 7 2024/05/10, 11
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