E-R Modeling
Authored by Vasuki R
Computers
University
Used 41+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Entity is a _________
Object of relation
Present working model
Thing in real world
Model of relation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Who developed the E-R model?
Codd
Chen
Date
Bachman
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the components of an E-R model?
Entity
Attributes
Relationship
All the above
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The attribute name could be structured as an attribute consisting of first name, middle initial, and last name. This type of attribute is called
Simple attribute
Composite attribute
Multi-valued attribute
Derived attribute
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The attribute AGE is calculated from DATE_OF_BIRTH. The attribute AGE is
Single valued
Multi valued
Composite
Derived
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following can be a multivalued attribute?
Phone_number
Name
Date of Birth
Age
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A weak entity set in an E-R diagram is an entity set that :
has a primary key
must be part of a one to many relationship set
is not existence dependent on a dominant entity
must not participate as owner in an identifying relationship with another entity set
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