MS101 - Week 13

What entity type is used in the given diagram?

• STUDENT
• DOCTOR
• EMPLOYEE
• COURSE

Diamond shape is symbol for ?

• Entity

• Cardinality

• Relationship

• Atribut

This shape is symbol for ?

• Atribute

• Relationship

• Entity

• Cardinality

For ERD this shape describe for ?

• Cardinality

• Relationship

• Attribute

• Entity

_________is a person, place, object, event or concept in the user environment about which company wishes to maintain the data

• attribute
• entity
• relationship
• none of these

Which attribute is the PRIMARY KEY?

• EmpID
• Degree
• Name
• Birthday

An entity ____________.

• Is the association between two related processes

• Has cardinality (1:1, 1:N, or M:N)

• Shows if it can be null or no null

• Is a person, place or thing

• Is described with a verb phrase

What are the components of an E-R model?

• Entity

• Attributes

• Relationship

• All the above

An entity relationship diagram (ERD)_________.

• Is a use-case diagram enhanced graphically to show data and process modeling

• Is a high-level CASE diagram of data modeling used in business systems

• Is an illustration of external data flows to and from a business systems

• Is a picture that shows the information that is created, stored, and used by a business system

• Is a graphical display of the processes in a business system

A data model is a ______________.

• The mathematical model of formulas and logic used in a system

• The abstract creating of an ideal system transformation

• The model that is produced by extreme programming

• The expanded, thoroughly balanced and normalized use case for a system

• A formal way of representing the data that are used and created by a business system