Certified Information Systems Auditor (CISA) — Question 609

When a data center is attempting to restore computing facilities at an alternative site following a disaster, which of the following should be restored FIRST?

Answer options

• A. Operating system
• B. Data backups
• C. Decision support system
• D. Applications

Correct answer: A

Explanation

Restoring the operating system is crucial as it serves as the foundation for all other components and applications. Without an operational OS, the data backups, applications, and decision support systems cannot be effectively utilized. Therefore, the operating system is the first priority, while the others depend on its functionality to be restored.