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CSCI334 > Lecture 5 > Flashcards

Lecture 5 Flashcards

1
Q

What are the two main components of a Class Diagram?

A

Class Attributes at the top, Class Functions at the bottom.

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2
Q

What does Inheritance represent in a Class Diagram?

A

It shows the relationship where one class inherits properties and methods from another class.

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3
Q

What does Composition represent in a Class Diagram?

A

It represents a whole-part relationship where the part cannot exist independently of the whole.

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4
Q

What does Aggregation represent in a Class Diagram?

A

It represents a whole-part relationship where the part can exist independently of the whole.

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5
Q

What does Multiplicity indicate in a Class Diagram?

A

It indicates how many instances of one class can be associated with one instance of another class.

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6
Q

What are the main objects in a Dynamic Model of a Sequence Diagram?

A

Objects, Functions, returned variables

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7
Q

What is the method used in a Dynamic Model of a Sequence Diagram?

A

find(description), (foundMatch(description), fetch(description), clone(item).

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8
Q

What does an IF / ELSE statement represent in a sequence diagram?

A

It shows conditional logic where actions are taken based on the state.

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9
Q

What does the IF condition ‘if balance >= amount’ represent in a sequence diagram?

A

If balance is greater than or equal to the amount, addDebitTransaction() and storePhotoOfCheck(theCheck).

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10
Q

What actions are taken if the IF condition ‘balance >= amount’ is not met?

A

addInsufficientFundFee(), noteReturnedCheck(theCheck), returnCheck(theCheck).

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11
Q

What does ‘getAmount()’ represent in a class diagram?

A

It is a method in the Check class.

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12
Q

What does a solid line in a sequence diagram represent?

A

A solid line represents a request sent from one object to another.

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13
Q

What does a dotted line in a sequence diagram represent?

A

A dotted line represents the return of a value or variable from a function.

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14
Q

What do the boxes in a sequence diagram represent?

A

They mean the objects are active/running.

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15
Q

What do the dashed lines in a sequence diagram represent?

A

They mean the objects are waiting.

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16
Q

What is a Practice Question for sequence diagrams?

A

Draw a sequence diagram documenting the interaction where a Game class sends a roll() message to a Dice class, which sends a nextInt(6) message to a Random class, increments the result by one, and returns it to the Game object.

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17
Q

What does a black dot represent in a Dynamic State Diagram?

A

Initial State.

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18
Q

What does a black dot with a circle outline represent in a Dynamic State Diagram?

A

End State.

19
Q

What are the three states in a Dynamic State Diagram?

A

Stopped and Reset, Keeping Time, Paused.

20
Q

What does the Video Check-out State Diagram illustrate?

A

It shows the process of checking out a video, including the event of a customer appearing.

21
Q

What happens if the event ‘Customer Appears’ does not occur in a Video Check-out State Diagram?

A

The process will not proceed to the next action and will stay on the start.

22
Q

What is a Concurrent Composite State Diagram?

A

A state diagram that shows concurrent states and transitions.

23
Q

What is shown in the Dynamic Model of a Sequence Diagram?

A

Objects and their interactions over time.

24
Q

What is the purpose of the ‘IF / ELSE’ statement in sequence diagrams?

A

To handle different scenarios based on conditions.

25
Q

What is an example of a method used in sequence diagrams?

A

find(description), fetch(description), clone(item).

26
Q

What are the 3 categories making up the 9 Constructive Principles

A

Modularity principles, Implementability principles, Aesthetic principles

27
Q

List all 9 Constructive Principles

A

Modularity; Small Modules, Information Hiding, Least Privilege, Coupling, Cohesion

Implementability; Simplicity, Design WITH Reuse, Design FOR reuse

Aesthetic Principles; Beauty

28
Q

What is Small Modules

A

Designs with small modules are better

29
Q

What is Information Hiding

A

Each module should shield details of its internal structure and processing from other modules

30
Q

What is Least Privilege

A

Modules should not have access to unneeded resources.

31
Q

What is Coupling

A

Module coupling should be kept to a minimum.
Coupling is the degree of connection between pairs of modules

32
Q

What is Beauty

A

Beautiful designs are better

32
Q

What is Cohesion

A

Modules cohesion should be maximized.
Cohesion is the degree to which a module’s parts are related to each other

33
Q

What is Simplicity

A

Simpler designs are better

34
Q

What is Design WITH and FOR Reuse

A

Designs that reuse existing assets or product reusable assets are better.

35
Q

What are the steps to create a State Diagram

A
  1. Identify the states and events that can occur
  2. Write down the states in a box spread apart from each other
  3. Connect the state boxes with lines of events that can occur that change/alter the state
36
Q

What do the black does represent in a State Diagram

A

Black Dot: Initial State
Black Dot with circle outline: End State

37
Q

How is the Initial State represented in a State Diagram

A

Black Dot

38
Q

How is the End State represented in a State Diagram

A

Black Dot with circle outline

39
Q

If an arrow goes left to right in a Sequence Diagram, which class owns the function?

A

The class it points to, as it is requesting the function to that class

39
Q

What do dashed lines in a Sequence Diagram mean

A

When from Sequence Path = Waiting to be activated (Vertical)

When from Active Box = returned object/variable (Horizontal)

40
Q

In a class diagram, how is Inheritance displayed

A

Arrow from the Subclass to the Superclass

Person <— Male

41
Q

In a class diagram, how is Aggregation

A

From one class, line to aggregation class with diamond touching class with 1..* for example on it

CSCI334 (10 decks)

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