Data Modeling in System Analysis & Design

A formal way of representing the data that are used and created by a business system is called as data model

• True

• False

Data models should balance with process models.

• TRUE

• FALSE

The process analysts used to validate data models is called ________.

• business process

• entity relationship model

• normalization

• analysis

How many entity (entities) is (are) there in the figure?

• 1

• 2

• 3

• 4

This ERD specifies

• many custom drone order instances are created by many customer instance

• each custom drone order instance is created by many customer instances

• many customer instances can create many custom drone order instances

• one customer instance can create many custom drone order instances

How many attributes for CUSTOMER entity?

• 1

• 8

• 9

• 11

A customer instance must exist in any custom drone order instances.

• TRUE

• FALSE

Label A, B and C

• attributes, entity, relationship

• entity, attributes, relationship

• identifier, attributes, entity

• cardinality, modality, relationship

1:N reads as

• one to one

• one to many

• many to many

• many to one

Which statement is FALSE about relationship in ERD?

• relationship is association between entities

• relationship go in one direction

• relationship should use active verb names

• relationships have cardinality and modality properties