CISA Domain 4: System Interfaces

This episode is part of the CISA Domain 4 Deep-Dive Series, a structured curriculum that covers every subtopic in the 26% Information Systems Operations & Business Resilience domain. Each episode blends CISA exam reasoning with real-world audit leadership.

In Episode 26, we examine a scenario where a data interface ran “successfully” — yet silently dropped hundreds of transactions due to unmapped fields. The business believed the interface was healthy because no errors appeared, even though financial data was incomplete.

You’ll learn:

✔ What CISA really tests under System Interfaces

✔ Why interfaces can succeed technically but fail functionally

✔ How junior auditors think vs. how audit leaders analyze data flow integrity

✔ What evidence auditors must review: mapping, transformations, source–target reconciliation

✔ How missing mappings, stale master data, and weak exception handling cause silent errors

✔ How to evaluate interface governance and change coordination

This episode builds deep mastery in one of the most exam-tested areas of Domain 4.

If you’re preparing for CISA or sharpening your audit judgment,

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