Which OS function is responsible for controlling access to resources and protecting data?

• A. Graphics rendering
• B. Database indexing
• C. Audio playback
• D. Security management

Answer: (D)

The main idea being tested is how an operating system governs who can access what and how it keeps data safe. Security management is responsible for enforcing access control and protecting resources and data. It handles authentication (verifying who you are), authorization (granting the right to perform actions or access resources), and auditing (tracking access). By implementing policies and mechanisms such as access control lists, capabilities, and process isolation through memory protection, the OS ensures that only permitted users and processes can read, modify, or execute resources.

Graphics rendering, database indexing, and audio playback are about creating visuals, organizing data, and playing sound, respectively—functions that don’t manage who can access resources or safeguard data.