Lecture 3-System Architecture

Question 1

What is a context diagram used for(3)?

Answer 1

-Tool for business analysts
-Part of the requirements document in a project
-Used by the project stakeholders

Question 2

What does layered architecture do?

Answer 2

It organizes the components of a software system into separate layers, each with a specific purpose and function.

Question 3

What are some advantages of using layers (4)?

Answer 3

• reusability (lower layers contain reusable functions)
• work division (separation of concerns, high cohesion)
• easy to understand, test, and debug.
• some layers can be replaced with new implementations.

Question 4

What are some disadvantages of using layers(2)?

Answer 4

-Limited scalability
-Can be error prone –> since there is interdependence between layers , parallel processing is not possible

Question 5

Why use layered architecture (3)?

Answer 5

-Good choice for small, simple apps, or web sites
-Good as starting point
-One of the lowest-cost architecture style

Question 6

What is the Model-View separation principle?

Answer 6

Model –> domain layer
View–> UI layer