Certified Information Systems Auditor (CISA) — Question 452

An organization plans to receive an automated data feed into its enterprise data warehouse from a third-party service provider. Which of the following would be the
BEST way to prevent accepting bad data?

Answer options

• A. Purchase data cleansing tools from a reputable vendor.
• B. Appoint data quality champions across the organization.
• C. Obtain error codes indicating failed data feeds.
• D. Implement business rules to reject invalid data.

Correct answer: D

Explanation

Implementing business rules to reject invalid data is the best approach because it allows the organization to automatically filter out any bad data before it enters the system. While purchasing data cleansing tools and appointing data quality champions can help, they do not directly prevent invalid data from being received. Error codes can indicate problems but do not proactively stop bad data from entering the warehouse.