E-R Modeling

E-R Modeling

University

15 Qs

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E-R Modeling

E-R Modeling

Assessment

Quiz

Computers

University

Practice Problem

Hard

Created by

Vasuki R

Used 41+ times

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15 questions

Show all answers

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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