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Questions on Design Patterns

Ashish Sureka

Joined: Mar 29, 2002
Posts: 3
I have few questions on Design Patterns
1)Out of a total of 48 questions, how many questions on an average covers the Design Patters Objective.
2)Does the exam covers only the 23 Design Patterns listed in Gamma et al. or there are other design patterns to study as well.
3)One of the objective says "Identify the Gamma et al design pattern associated with a specified J2EE technology feature". Can someone give some sample questions based on this objective.
Mark Spritzler

Joined: Feb 05, 2001
Posts: 17257

I can answer as best as someone without have taken the exam. But not the first question.
All 23 Design Patterns in the GOF book will be covered.
3. Home object is using Factory Method. Things like that.

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Win Yu
Ranch Hand

Joined: Oct 17, 2001
Posts: 224
Remote Object is using proxy.

Bagwan Mehrat
Ranch Hand

Joined: Jan 26, 2002
Posts: 119
Hi, Mark,
From discussions with other Architects, I had the impression that the design pattern questions in Exam I only covered 8 of the 23 GoF patterns (though I can't remember which ones exactly off the top of my head). Have you heard differently?
Mark Spritzler

Joined: Feb 05, 2001
Posts: 17257

Nah I haven't heard differently, and I agree that I think a few of the Design Patterns in GOF are almost overlapping, or duplicating some of the other patterns, and a couple of them are so out there, that they aren't used that much. But things like Factory, Proxy, Facade, Singleton, Builder, Chain of Responsibilty, Adapter, Composite, Decorator, Iterator, Mediator, and Observer are the most used patterns. and a few are already in Java itself, meaning the Iterator, Observer patterns are in Java directly with the Iterator class and the Observable interface. Mediator is a controller in MVC.
So I think they would probably gear their questions to these patterns. I mean when was the last time you implemented a FlyWeight?
Rufus BugleWeed
Ranch Hand

Joined: Feb 22, 2002
Posts: 1551
I'm going to bet that we get 48 questions selected out of a pool of N questions. All the patterns could be covered.
Cade and Simon have indicated that the pool of question changes with time. Questions get garbage collected and instatiated.
It is sorta covered in the JavaRanch Style Guide.
subject: Questions on Design Patterns