Certified Information Systems Auditor (CISA) — Question 552

Which of the following is the BEST data integrity check?

Answer options

• A. Tracing data back to the point of origin
• B. Performing a sequence check
• C. Counting the transactions processed per day
• D. Preparing and running test data

Correct answer: A

Explanation

Tracing data back to the point of origin is the most reliable method for ensuring data integrity, as it allows for verification of the accuracy and source of the data. The other options, while useful, do not provide as comprehensive a check on the data's integrity. Sequence checks, transaction counts, and test data runs are helpful but can miss errors that tracing might catch.