
Chapter 4
Authored by Aiman Hanif
Computers
University
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does an ERD primarily show?
User interface layout
Data types and formats
Entities, attributes, and relationships
Database backup plans
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In ER modeling, a ‘Customer’ would be an example of a(n):
Attribute
Relationship
Entity
Primary key
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following represents a weak entity?
Entity with multiple attributes
Entity with composite keys
Entity that is existence-dependent and has partial key
Entity that has a derived attribute
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does cardinality describe in ER modeling?
The number of attributes
The color of relationship lines
The number of entity occurrences in a relationship
The table row count
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of relationship exists when an entity is related to itself?
Binary
Recursive
Weak
Ternary
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which attribute type can be broken down into smaller parts like ‘FullName’?
Composite
Simple
Derived
Primary
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of a derived attribute?
Stores large text
Calculated from other attributes
Always mandatory
Defines relationships
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