Block 2

Question 1

What does the term Cardinality mean?

Answer 1

How many instances of an entity can related to one instance of the other entity

Question 2

What is a primary key?

Answer 2

An attribute that uniquely identifies an entity.

Question 3

What is a foreign key?

Answer 3

Linking attributes in the other entities

Question 4

What does the term Entity mean?

Answer 4

A type of thing on which an organisation may wish to hold data

Question 5

What does the term attribute mean?

Answer 5

The data we need to know about each entity

Question 6

What is an example of Simple attributes?
1) student_ID
2) exam_grade
3) hobbies

Answer 6

Student_ID

Question 7

What is an example of composite attributes?
1) hobbies
2) name=title + inital + surname
3) student_ID

Answer 7

name=title + inital + surname

Question 8

What is an example of single-valued attribute?
1) exam_grade
2) hobbies
3) hourly_rate

Answer 8

hourly_rate

Question 9

What is meant by the term attribute domain?

Answer 9

The set of all values in an attribute

Question 10

A trigger is a condition that must be
true before the use case has occurred.
1) True
2) False

Answer 10

False

Question 11

Business use cases describe interactions
between a computer system and its
users.
1) True
2) False

Answer 11

True

Question 12

A use case model describes part of a
system from:
A. A legal point of view
B. An operational point of view
C. A strategic point of view
D. A financial point of view

Answer 12

B. An operational point of View

Question 13

What is an extension use case also referred to as?

Answer 13

Exceptions, Variations and alternative flows

Question 14

What is it meant by minimum guarantee?

Answer 14

However else the use case ends

Question 15

What is it meant by Statement of Scope?

Answer 15

A short concise statement of the primary purpose, function or role of the system being developed.

Question 16

True or false

A use case is any direct interaction
with a computer system.

Use cases specify interface design.

An actor in a use case maybe not be
a human

Answer 16

1) False - Buisness use case is another form of use case

2) False - Use case specify functional requirements

3) True - An actor does not need to be human as a computer system can also be a human

Question 17

What is a ‘Casual’ use case ?

Answer 17

A normal, basic use case that includes,
Primary actor
Goal
Scope
Main sequence

Question 18

What is ‘Full - dressed’ use case?

Answer 18

The use case that may include more detail,
Supporting actors
Stakeholder
Trigger
Preconditions
Guarantees ( Success & Minimum)

Question 19

What is it meant by ‘Supporting Actor’?

Answer 19

A stakeholder who interacts with the system during the use case.

Question 20

What is it meant by ‘Pre-conditions’?

Answer 20

What must be true before the use case can occur

Question 21

Which one of these is included in a
‘casual’ use case?

A. Supporting actor
B. Pre-conditions
C. Goal
D. Trigger

Answer 21

C. Goal

Question 22

Which of the following statements is most
likely to describe the goal of a system use
case?

a. Add item number
b. Buy stock
c. Return item
d. Select delivery date

Answer 22

C. Return Item

Question 23

Events cause entities to change state.

1) True
2) False

Answer 23

True

Question 24

What is it meant by a state?

Answer 24

A recognisable period in the life of an object

Question 25

What is an activity?

Answer 25

An activity is an ongoing process of performing some action.

Question 26

What does an activity diagram show?

Answer 26

The ordering of activities and the transitions in between them

Question 27

Name 2 uses of an activity diagram

Answer 27

Business work flows and responsibilities
Sequencing of Business/System use case