When using an integrated test facility (ITF), an IS auditor should ensure that:

A.
production data are used for testing.

B.
test data are isolated from production data.

C.
a test data generator is used.

D.
master files are updated with the test data.

Explanation:
An integrated test facility (ITF) creates a fictitious file in the database, allowing for test transactions to be
processed simultaneously with live data. While this ensures that periodic testing does not require a separate
test process, there is a need to isolate test data from production data. An IS auditor is not required to use
production data or a test data generator. Production master files should not be updated with test data.