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ISACA Certified Information Systems Auditor · Isaca
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Key Concept (CISA Domain 2 – IT Operations and Business Resilience) > Job sequencing controls ensure that batch processing follows the correct order so that dependent data is valid and reliable. Violating sequence = data integrity risk, which is the most significant concern.
Vote for D. - A. and B. are not risks per se, but possible root causes. If we compare C. and D. to get the answer to the question about the "*MOST* significant risk" it's clearly D. as returning invalid data is for sure a more significant than an incomplete job which will return anyway an incompletion error message to the operator.
When a high-priority update job runs out of sequence, it may not have the necessary input or context to process data correctly. As a result, there's a significant risk that the job completes its processing with invalid data. This directly impacts data integrity and can have serious consequences for the organization, especially if decisions are made based on the erroneous data.