CSE Exam 3 Design Patterns and Architectures

What is a stylized description of good design practice, which has been tried and tested in different environments?

architectural patterns

The results and trade-offs of applying the pattern are known as _______________

consequences

What architectural view shows how the software is decomposed for development?

development view

A ______________________ (2 words) is a description of how a software system is organized

software architecture

a __________________ (2 words) is not a concrete design, but a template for a design solution that can be instantiated in different ways

solution description

What are the 4 architectural views related by?

use cases or scenarios

What architectural view shows how, at run-time, the system is composed of interacting processes

process view

What are the 3 roles of the view in the MVC?

- renders the model - requests model updates - sends user events to the controller

Which pattern allows for the possibility of extending the functionality of an existing class at run-time?

Decorator pattern

What are 4 elements of a pattern?

1) Name 2)Problem description 3) solution description 4) consequences

What are the 2 roles of the model in the MVC?

1) encapsulates application state 2) notifies the view of state changes

What are the 2 roles of the controller in the MVC?

1) maps user actions to model updates (state change) 2) selects the view

What are the 2 ways that sub-systems can exchange data?

1) shared data is held in a repository and may be accessed by all sub-systems 2) each sub-system maintains its own repository and may be accessed by all sub-systems

List the 3 components of the client server architecture model

1) stand-alone servers which provide specific services 2) set of clients which call on the services 3) network which allows clients to access the servers

List 3 architectural design decisions

1) the type of application 2) the distribution of the system 3) the architectural styles to be used

What identifies the main structural components in a system and the relationships between them?

Architectural design

What is the critical link between design and requirements engineering?

Architectural design

__________________ (3 words) is a distributed system model which shows how data and processing is distributed across a range of components

Client server architecture

What is a way of reusing abstract knowledge about a problem and its solution?

Design patterns

Which pattern tidies up the interfaces to a number of related objects that have often been developed incrementally?

Facade Pattern

T/F Architectural design is not concerned with understanding how a software system should be organized but is concerned with designing the overall structure of the system

False - It is concerned with BOTH

T/F Each architectural model shows three views or perspectives of the system

False - it only shows ONE

T/F In a layered architecture, when a layer interface changes, every layer is affected

False - only the adjacent layer is affected

T/F Pipe and filter architecture are suitable for interactive systems

False. They are not really suitable

Which pattern provides a standard way of accessing the elements in a collection, irrespective of how that collection is implemented?

Iterator pattern

What's used to model interfacing sub-systems?

Layered architecture

Pattern descriptions should usually make use of _______________ (3 words)

Object oriented characteristics

Which pattern tells several objects that the state of some other object has changed?

Observer pattern

List 4 types of design patterns

Observer pattern Facade pattern Iterator pattern Decorator pattern

___________ are a means of representing, sharing, and reusing knowledge

Patterns

Which architectural pattern models the runtime organization of a system?

Pipe and filter architecture

Which model is most suited when large amounts of data are to be shared?

Shared repository model (data is held in a central repository)

T/F A design pattern should be sufficiently abstract to be reused in different settings

True

T/F Patterns should include information about when they are and when they are not useful

True

A name is a pattern element. Define name

a meaningful pattern identifier

In a pipe and filter architecture, when transformations are sequential, it is called

batch sequential model

What architectural view shows the key abstractions in the system as objects or object classes?

logic view

What are the 4+1 view models of software architecture?

logic view process view development view physical view +1 = related using use cases or scenarios

What are the 3 components of a Model-view controller (MVC) pattern?

model controller view

A ____________ is a description of the problem and the essence of its solution

pattern

What architectural view shows the system hardware and how software components are distributed across the processors in the system?

physical view

In which model is the output of one process the input of another process?

pipe and filter architecture

List 2 ways that patterns may be represented

tabular and graphical descriptions