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Attributes May Be - .: Communicationsunit@unilag - Edu.ng

The document appears to be a series of multiple choice questions from an online course on database systems and design. It includes 30 questions testing concepts like attributes, functional dependencies, database normalization, entity relationships and identifiers. The questions cover topics such as the definition of attributes, what does not constitute a modification of a database, determining variables in functional dependencies, characteristics of intersection tables in many-to-many relationships, and the definition of referential integrity constraints.

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Oluwayemi Akinjide
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27 views4 pages

Attributes May Be - .: Communicationsunit@unilag - Edu.ng

The document appears to be a series of multiple choice questions from an online course on database systems and design. It includes 30 questions testing concepts like attributes, functional dependencies, database normalization, entity relationships and identifiers. The questions cover topics such as the definition of attributes, what does not constitute a modification of a database, determining variables in functional dependencies, characteristics of intersection tables in many-to-many relationships, and the definition of referential integrity constraints.

Uploaded by

Oluwayemi Akinjide
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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 https://unilag.edu.ng  communicationsunit@unilag.edu.

ng
  

Oluwayemi Olawale Akinjide 

Home  My courses  CSC410_2023/2024

Question 21 Answer saved Marked out of 1

Attributes may be ________.

Select one:
a. complete
b. optional
c. multivalued
d. required

Question 22 Answer saved Marked out of 1

Which of the following is not Modification of the Database?.

Select one:
a. Deletion
b. Insertion
c. Sorting
d. Updating
Question 23 Answer saved Marked out of 1

Given the functional dependency A → (B, C), A is a(n) ________.

Select one:
a. independent variable
b. dependent variable
c. determinant
d. composite determinant

Question 24 Answer saved Marked out of 1

In many-to-many relationships between strong entities in a relational database design, which of


the following is not true?

Select one:
a. The intersection table is ID-dependent on one of the parents
b. The intersection table is ID-dependent on both of the parents
c. The relationships from the intersection table to the parent tables are identifying
relationships
d. The maximum cardinality to the intersection table is always N

Question 25 Answer saved Marked out of 1

A functional dependency between two or more non­key attributes is called?.

Select one:
a. Transitive dependency
b. Partial transitive dependency
c. Functional dependency
d. Partial functional dependency
Question 26 Answer saved Marked out of 1

In database systems, the DBMS enforces rules about which data can be written in certain
columns. The rules are known as ________.

Select one:
a. data insertion control
b. data modification control
c. concurrency control
d. referential integrity constraints

Question 27 Answer saved Marked out of 1

If the removal of facts about one entity results in the unintentional loss of data about another
entity, this is referred to as a(n) ________.

Select one:
a. normalization anomaly
b. insertion anomaly
c. update anomaly
d. deletion anomaly

Question 28 Answer saved Marked out of 1

A relation is in second normal form (2NF) if and only if it is in 1NF and ________.

Select one:
a. all non-key attributes are determined by the entire primary key
b. there are no non-key attributes determined by another non-key attribute
c. every attribute is a candidate key
d. every candidate key is a determinant
Question 29 Answer saved Marked out of 1

An occurrence of a particular entity is called an ________.

Select one:
a. entity class
b. entity relationship
c. entity instance
d. entity attribute

Question 30 Answer saved Marked out of 1

An identifier may be ________.

Select one:
a. composite
b. optional
c. a relationship
d. minimal

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