Architecture

Question 1

Types of architecture

Answer 1

1. Data centered
2. Data flow architecture
3. Call and return (main program/subprogram)
4. Object-oriented (?!!!)
5. Layered

Question 2

Class design principles

Answer 2

1. Open-closed
2. Liskov substitution principle
3. Dependency inversion
4. Interface segregation
5. Release reuse equivalence
6. Common closure
7. Common reuse

Question 3

Open-closed principle

Answer 3

Class (component) is open for extension but closed for modification (interface)

Question 4

Liskov substitution principle

Answer 4

Subclasses should be substitutable for their base classes

Question 5

Dependency inversion principle

Answer 5

Depend on abstractions, don’t depend on concretions.

Question 6

OCL example

Answer 6

context
pre:
post:
inv:

Question 7

What is a client-server architecture?

Answer 7

3 components:

1. A set of stand-alone servers offering services.
2. A set of clients that call on services offered by the servers.
3. A network allowing communication between the servers and the clients.

Question 8

Interface segregation principle

Answer 8

Clients shouldn’t depend on method they don’t use.

Leeds to splitting of interfaces.

Question 9

Release reuse principle

Answer 9

Only released (finished) component can be reused

Question 10

Common closure pronciple

Answer 10

Package classes together if they are likely to be changed together.

Question 11

Common reuse principle

Answer 11

Package classes together if they are likely to be used together.