Question

1. How does the object-oriented view of component-level design differ from the traditional view?

(Section 14.1.1 and 14.1.2)

2. Describe the differences between the software engineering terms coupling and cohesion?

(Section 14.2.3 and 14.2.4)

3. Describe the component-level design for WebApps.

(Section 14.4)

4. What is the intent of domain engineering in CBSE?

(Section 14.7.1)

5. List three principles that should be applied when building any user interface.

(Section 15.1)

6. What framework activities are completed when following an evolutionary (or spiral) user interface development process?

(Section 15.2.2)

7. List four interface design issues presented in the development of most user interfaces.

(Section 15.4.3)

8. What are the primary design objectives of a WebApp interface?

(Section 15.5)

Answer 1

1. Differences between Object-oriented View and Traditional View:

Object-Oriented View:

• This view focuses on the elaboration of design classes that come from both the problem and infrastructure domains.
• Classes are elaborated by specifying messaging details, identifying interfaces, defining attribute data structure and describing process flow for operations.

Traditional View:

• In this view, 3 components are refined: Control modules, domain modules and infrastructure modules.
• This requires representations to be created for data structures, interfaces and algorithms for each program module in enough details to generate programming language source code.

2. Differences between Coupling and Cohesion:

Coupling:

• This is a qualitative measure of the degree to which components are connected to one another.
• It shows how they are connected.

Cohesion:

• This implies that a component or class encapsulates only the attributes and operations closely related to one another and to the class itself.

3. Component-level design for WebApps:

• It considers both content and functionality as it is delivered by a web-based system.
  • Content Design: Content design at the component level focuses on content objects and the manner in which they may be packaged for presentation to a WebApp end user.
  • Functional Design: This focuses on processing functions that manipulate the content, perform computations, query and access a database, and establish interfaces with other systems.
    • All component-level principles and guidelines are applied for this.

4. Intent of domain engineering in CBSE:

• The intent of domain engineering is to identify, construct, catalog and disseminate a set of software components that have applicability to existing and future software products.

5. Principles to apply when building any user interface:

• User should be placed in control
• User's memory load should be reduced
• Make the interface consistent

6.  Framework activities that needs to be completed when following an evolutionary (or spiral) user interface development process:

• Interface analysis and Modeling
• Design
• Construction
• Finally Validation