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SOEN341 Final Exam Questions And Answers. Verified and Updated.

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SOEN341 Final Exam Questions And Answers. Verified and Updated. Types of design patterns and explain each - answerCreational: Abstracts the object instantiationProcess Structural: Abstracts how classes and objects are composed to build larger structures Behavioural: Abstracts algorithms and as...

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  • August 5, 2024
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SOEN341 Final Exam Questions And
Answers. Verified and Updated.

Types of design patterns and explain each - answer✔✔Creational: Abstracts the object
instantiationProcess


Structural: Abstracts how classes and objects are composed to build larger structures


Behavioural: Abstracts algorithms and assignment of responsibility among objects

Explain Observer - answer✔✔Name: Observer (aka: Publish-Subscribe)


Problem description: Use when multiple presentations of an object's state are needed




Solution description: Separates presentation of object state from the object itself

Name 3 structural patterns - answer✔✔Adapter, composite, decorator

Explain Adapter - answer✔✔Name:
Adapter (aka: Wrapper)


Problem description:
Use when a class' interface doesn't match
with the hierarchy that we want to use


Solution description:
Inject a class to adapt the interface to the


EXAM STUDY MATERIALS July 24, 2024 1:33:58 PM

,expectation

Explain overriding - answer✔✔Allows subclasses to redefine
methods that superclasses have
already defined or declared

Explain interfaces - answer✔✔Defines the methods that a class will
respond to


Can be declared in a .java file

Explain abstract class - answer✔✔Can declare methods without
providing an implementation


Can define methods as well


Cannot be instantiated directly

Name creational patterns - answer✔✔Abstract factory, Factory method

Explain factory method - answer✔✔Name:
Factory Method (aka: Virtual Constructor)


Problem description:
Use when a class cannot anticipate the
objects it must create


Solution description:
Defers the responsibility of creating objects
to subclasses that know what to create

Explain abstract factory - answer✔✔Name:
Abstract Factory (aka: Kit)


EXAM STUDY MATERIALS July 24, 2024 1:33:58 PM

, Problem description:
Use when your system must be configured
with one of multiple families of objects


Solution description:
Creates abstractions that hide the
configuration details of the object families

Explain composite - answer✔✔Name:
Composite


Problem description:
Use to allow clients to treat individual
objects and collections of them identically


Solution description:
Use an abstraction to hide the fact that an
object is an aggregate of several objects


Example: arithmetic tree

Explain decorator - answer✔✔Name:
Decorator


Problem description:
Add additional responsibility to an object
dynamically. An alternative to subclassing.


Solution description:

EXAM STUDY MATERIALS July 24, 2024 1:33:58 PM

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