Question
QUESTION 30 A 'whole-part relationship' describes an association in which one or more classes make up the parts of a larger whole class. This relationship
QUESTION 30
A 'whole-part relationship' describes an association in which one or more classes make up the parts of a larger whole class. This relationship is also known as an 'aggregation'.
True
False
2 points
QUESTION 31
In a database table, the _______ is a field or column that uniquely identifies a record.
a. | alternate key | |
b. | secondary key | |
c. | primary key | |
d. | candidate key |
2 points
QUESTION 32
A 'compound key' is also known as a __________.
a. | primary key | |
b. | candidate key | |
c. | composite key | |
d. | none of these |
2 points
QUESTION 33
Which of the following means 'not changing during normal operations'.
a. | entity | |
b. | normal | |
c. | immutable | |
d. | none of these |
2 points
QUESTION 34
A(n) _________ is often used to display a subset of data from a table or file.
a. | attribute | |
b. | form | |
c. | query | |
d. | none of these |
2 points
QUESTION 35
A ________ is a symbol (often an *) that means 'all' or 'any'.
a. | wildcard | |
b. | dependency | |
c. | batch | |
d. | none of these |
2 points
QUESTION 36
__________ is the process of designing and creating a set of database tables that satisfies the user' needs and avoids redundancies and anomalies.
a. | Normalization | |
b. | Unification | |
c. | Combination | |
d. | none of these |
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