CSI System-to-System Integration Patterns 2

Question 1

Which integration pattern is best suited when a source system must trigger actions in multiple downstream systems simultaneously without waiting for responses?

Accepted Answer

Publish-Subscribe

Answer

Publish-Subscribe decouples the sender from receivers, allowing one event to fan out to multiple subscribers simultaneously.

Question 2

In an ESB-based integration architecture, what is the primary responsibility of the message broker?

Accepted Answer

Routing, transforming, and mediating messages between systems

Answer

An ESB message broker handles routing logic, protocol mediation, and message transformation between heterogeneous systems.

Question 3

A company integrates two systems using canonical data model (CDM). What is the main benefit of this approach?

Accepted Answer

It reduces point-to-point mappings by using a shared neutral format

Answer

A CDM provides a neutral data format so each system maps only to/from the canonical model rather than to every other system directly.

Question 4

Which pattern uses a database table or queue to temporarily store messages so that the sender and receiver do not need to be available at the same time?

Accepted Answer

Store-and-Forward

Answer

Store-and-Forward decouples temporal availability by persisting messages until the receiver is ready to process them.

Question 5

When integrating a legacy COBOL mainframe with a modern REST API, which integration approach is most commonly used to avoid rewriting the legacy system?

Accepted Answer

Wrapping the legacy system with an adapter or facade

Answer

An adapter or facade exposes legacy functionality through a modern interface without requiring internal changes to the legacy system.

(CSI) Certified System Integrator Practice Test

(CSI) Certified System Integrator Practice Test

CSI System-to-System Integration Patterns 2