After being in operation for many years, a document management system must be decommissioned as it has reached its end of life. This system will not…

Maintenance testing includes activities related to system retirement or decommissioning. In this scenario, there is a legal requirement to archive all documents. This necessitates a data migration from the operational system to a state archive. Testing this migration process is essential to ensure the data is transferred completely, accurately, and remains accessible for the required 20-year period. This activity falls under the scope of maintenance testing for system retirement.

A. Maintenance testing is required for system retirement, especially when data archiving or migration is involved, as stated in the syllabus.
C. Confirmation testing verifies that a specific defect has been fixed. Decommissioning is a planned lifecycle event, not a defect fix.
D. Regression testing checks for unintended side effects in unchanged parts of a system. Since the system is being retired, this is not the primary testing concern.

ISTQB® Certified Tester Foundation Level Syllabus V4.0, Section 2.3, page 23: "Triggers for maintenance testing include... Retirement of a system (e.g., decommissioning), which may require testing of data migration or archiving if long data-retention periods are required."

ISTQB® Glossary of Testing Terms v4.0, Definition of "maintenance testing": "Testing the changes to an operational system or the impact of a changed environment on an operational system."