INF2603_Assessment_5_Answers

Assessment 5: Attempt review https://mymodules.dtls.unisa.ac.za/mod/quiz/review.php?attempt=190




UNISA  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




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,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




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