Lecture 5 - System Architecture

Question 1

TF: Context diagrams are used by engineers and technicians

Answer 1

False. Only used by project stakeholders

Question 2

TF: Context diagrams are part of the requirements document in a project

Answer 2

True

Question 3

TF: Context diagrams help understand the system

Answer 3

True

Question 4

TF: Context diagrams facilitate brainstorming

Answer 4

True

Question 5

The Logical Architecture (LA) defines…

Answer 5

The packages within which software classes are defined

Question 6

The layered architecture organizes the components of software system…

Answer 6

into separate layers, each with a specific purpose and function

Question 7

TF: The layered architecture facilitates making changes to source code

Answer 7

True

Question 8

TF: Code reusability is not a benefit of the layered architecture

Answer 8

False. It does make code more reusable

Question 9

TF: Using layers does not make it easier to test and debug code

Answer 9

False. Separate layers means easier to pinpoint source of bugs and test components

Question 10

TF: Using layers means once the layer is created, it cannot be replaced

Answer 10

False. Benefit of using layers is the ability to replace layers with new implementation

Question 11

TF: Scalability is a disadvantage of layers

Answer 11

True. Layers are dependent and each layer focuses on one set of functionality

Question 12

TF: layers are easy to maintain

Answer 12

False. Difficult to maintain since change in one layer can affect entire system

Question 13

TF: Parallel processing is possible using layers

Answer 13

False. Since each layers dependent on each other, previously layer needs to be completed before next one can start

Question 14

When should a system use layered architecture? (2)

Answer 14

• Systems with moderate to large complexities
• Systems that have a long lifetime that requires maintenance and evolution

Question 15

TF: In Model-View Separation, it is okay to couple non-UI objects with UI objects

Answer 15

False. Should not couple them since the non-UI objects may be used in other applications or attached to new interfaces

Question 16

TF: It is okay to put application logic in the UI object methods

Answer 16

False. UI object should only initialize UI elements and should delegate requests for application logic to non-UI objects (domain objects)