Term
| what does it mean by 2 objects are inherently concurrent? |
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Definition
| two objects can receive events at the same time without interacting |
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Term
| what is source of identification for inherently concurrent? |
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Definition
| objects in a sequence diagram that can simultaneously receive events |
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Term
| what is a thread of control? |
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Definition
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Term
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Definition
| flaw in output depends on specific sequence of others |
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Term
| what are two ways to implement concurrent system? |
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Definition
1. physical concurrency
2. logical concurrency |
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Term
| what are two questions addressed in HW/SW mapping? |
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Definition
1. how to realize subsystems?
2. map a object to HW or SW? |
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Term
| what is the difference between physical connectivity and logical connectivity? |
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Definition
| physical connectivity describes which component belongs to which HW but logical connectivity describes which component belongs to which subsystem in software |
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Term
| how is UML component represented in UML? |
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Definition
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Term
| what's purpose of deployment diagram? |
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Definition
| illustrates distribution of components at run time for physical locations |
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Term
| what's purpose of component diagram? |
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Definition
| illustrates dependencies between components at design, compilation, and run time |
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Term
| when should deployment diagram be drawn? |
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Definition
| after subsystem decomposition, concurrency, and HW/SW mapping |
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Term
| how is dependency shown in component diagram? |
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Definition
use provide and require
provide has ball
require doesn't have ball |
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Term
| what is use of port in component diagram? |
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Definition
| distinct interaction point between components |
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Term
| how is port shown in component diagram? |
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Definition
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Term
| how is dependency shown in deployment diagram? |
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Definition
| dashed lines and provide/required |
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Term
| how is each class mapped to database? |
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Definition
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Term
| how is each class's attributes mapped to database? |
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Definition
| each attribute is a column |
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Term
| if there are many instances which are same class, how are they mapped to DB? |
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Definition
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Term
| how is one-to-many associations mapped to DB? |
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Definition
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Term
| how is many-to-many associations mapped to DB? |
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Definition
to their own table
junction table |
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Term
| what is global resource handling about? |
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Definition
| access rights for different classes of actors |
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Term
| in access matrix, what does row represent? column represent? |
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Definition
row: actor
column: access of class |
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Term
| what is access control list? |
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Definition
list of (actor, operation) pair with each class
basically on the software side, there is a list of who can access |
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Term
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Definition
associates (class, operation) pair with actor
basically actor needs to have a ticket to get access |
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Term
| what is software control? |
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Definition
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Term
| give an example where a system is centralized control |
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Definition
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Term
| give an example where a system is decentralized control |
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Definition
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Term
| for distributed computing, centralized control or decentralized control, which one do you prefer? why? |
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Definition
| decentralized control because it's possible to speedup by mapping objects to different computer |
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Term
| what is pro and con of centralized design? |
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Definition
pro: change in control structure is easy
con: maybe performance bottleneck |
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Term
| what is pro and con of decentralized design? |
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Definition
pro: good with OO
con: responsibility is spread out |
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Term
| what are 4 boundary conditions? |
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Definition
1. initialization
2. configuration
3. termination
4. failure |
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Term
| how to find boundary condition in use case model? |
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Definition
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Term
| what are 6 system design activities? |
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Definition
1. concurrency
2. HW/SW mapping
3. database
4. resource control
5. software control
6. boundary condition |
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