Explanation A parallel test is the best method to evaluate the effectiveness of an alternate processing site when continuous uptime is required because it involves processing data at both the primary and alternate sites simultaneously without disrupting the normal operations1. A full interruption test would cause downtime and potential loss of data or revenue2. A simulation test would not provide a realistic assessment of the alternate site's capabilities3. A tabletop test would only involve a discussion of the procedures and scenarios without actually testing the site4. 1: CISM Exam Content Outline | CISM Certification | ISACA 2: CISM - ISACA Certified Information Security Manager Exam Prep - NICCS 3: Prepare for the ISACA Certified Information Security Manager Exam: CISM ... 4: CISM: Certified Information Systems Manager | Official ISACA ... - NICCS