How Design Patterns Solve Problems

Question 1

How might a design pattern help find appropriate objects?

Answer 1

Identifies abstractions and objects that represent them

Question 2

How might a design pattern help determine object granularity?

Answer 2

Supporting lots of objects or decomposing an object into smaller objects

Question 3

How might design patterns help specify object interfaces?

Answer 3

Patterns help by identifying key elements and the data types that get sent to the interfaces. Also, the relationships between the interfaces.

Question 4

How might patterns help with specifying object implementations?

Answer 4

Patterns specify what to implement and abstract the creation process so the program is written to the interfaces, not the implementations

Question 5

How could patterns help with putting reuse mechanisms to work?

Answer 5

Patterns explicitly distinguish between run-time and compile-time structures and avoid over-using inheritance

Question 6

How might patterns help design for change?

Answer 6

Patterns provide robust implementation by letting one aspect independently vary from another