CPSA Designing Building Blocks 4

Question 1

Which design principle helps prevent building blocks from becoming overly large by limiting their public interfaces?

Accepted Answer

Interface Segregation Principle

Answer

The Interface Segregation Principle states that clients should not be forced to depend on interfaces they do not use, promoting smaller, focused interfaces.

Question 2

A 'black box' perspective on a building block means that:

Accepted Answer

Only the block's interface and behavior are visible, not its internals

Answer

A black box view exposes only what a block does (its interface and behavior) without revealing how it does it internally.

Question 3

What is the relationship between 'abstraction level' and building block granularity in architecture documentation?

Accepted Answer

Higher abstraction levels show coarser-grained blocks with fewer details

Answer

At higher abstraction levels, building blocks represent larger, coarser-grained components; detail increases as you zoom into lower levels.

Question 4

Which of the following is a CORRECT way to express that Building Block A depends on Building Block B?

Accepted Answer

A's required interface matches B's provided interface

Answer

A dependency from A to B means A requires a service that B provides — A's required interface is fulfilled by B's provided interface.

Question 5

In the context of building block design, what does 'stable dependency principle' prescribe?

Accepted Answer

Frequently changing blocks should depend on stable blocks

Answer

The Stable Dependency Principle states that dependencies should point toward more stable components to limit change propagation.

CPSA Exam Practice Test

CPSA Exam Practice Test

CPSA Designing Building Blocks 4