CPSA Architectural Patterns and Styles 4

Question 1

Which architectural quality attribute does the Bulkhead pattern primarily protect?

Accepted Answer

Availability and fault isolation

Answer

The Bulkhead pattern isolates components into pools so that a failure or resource exhaustion in one pool does not cascade to others, preserving overall system availability.

Question 2

In a layered (n-tier) architecture, what rule governs the direction of dependencies between layers?

Accepted Answer

Higher layers may only depend on lower layers, never the reverse

Answer

The strict layering rule dictates that each layer only depends on the layer directly below it, preventing upward dependencies and promoting loose coupling.

Question 3

Event-Driven Architecture (EDA) most directly improves which architectural quality?

Accepted Answer

Temporal decoupling between producers and consumers

Answer

EDA allows producers to emit events without waiting for consumers to process them, enabling components to operate and scale independently at different speeds.

Question 4

Which statement correctly distinguishes Orchestration from Choreography in distributed workflow coordination?

Accepted Answer

Orchestration uses a central controller that tells services what to do; choreography relies on services reacting to events

Answer

In orchestration, a central workflow engine explicitly directs service execution order, while choreography has services react autonomously to domain events without central coordination.

Question 5

The Space-Based Architecture (SBA) pattern addresses scalability by eliminating which common bottleneck?

Accepted Answer

The central database as a synchronization point by distributing both data and processing

Answer

SBA distributes processing units with their own in-memory data grid, removing the central database bottleneck and enabling near-linear horizontal scaling.

CPSA Exam Practice Test

CPSA Exam Practice Test

CPSA Architectural Patterns and Styles 4