UML

Question 1

What does a Class diagram look like (3 parts)?

Answer 1

Classes (object), variables (state) & methods (behaviours)

Question 2

What are the 4 types of relationships between objects?

Answer 2

• Dependency – “uses”
• Aggregation – “has a”
• Inheritance – “is a”
• Association – “uses”

Question 3

What is the dependancy arrow?

Answer 3

Question 4

What is the aggregation arrow?

Answer 4

Question 5

What is the inheritance arrow?

Answer 5

Question 6

What is the association arrow?

Answer 6

Question 7

What is depedancy?

Answer 7

We use a dependency relationship to show when one element depends or uses another element.

It points from the independent entity to the dependent entity in the system.

Question 8

What is association?

Answer 8

A generic retationship meaning that 2+ objects are related in some way.

Aggregation is a particular type of Association.

Question 9

What is aggregation?

Answer 9

• Type of association
• HAS A
• 1 way relationship
• Both entries can survive individually

Question 10

What is inheritance?

Answer 10

Inheritance is the mechanism by which one class is allow to inherit the features (states and behaviours) of another class.

Including a Super class and Sub Class

Key word EXTENDS

Question 11

Parameter vs Argument

Answer 11