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Which of the following is the most effective practice to assess if unauthorized changes have been made to program code in a production environment?
Assess change approved designations configured within the change control system.
Review the change control system records and trace them forward to object code files.
Examine object code to find instances of changes and trace them back to change control records.
Audit access control permissions operating within the production program libraries.
The procedure of examining object code files to establish instances of code changes and tracing these back to change control system records is a substantive test that directly addresses the risk of unauthorized code changes. The other choices are valid procedures to apply in a change control audit but they do not directly address the risk of unauthorized code changes.
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