Which measure helps prevent untrusted apps from being installed on devices?

• A. App whitelisting
• B. Data encryption
• C. VPN usage
• D. Password rotation

Answer: (A)

App whitelisting ensures only approved software can be installed or run on a device. By maintaining a trusted catalog of applications and blocking anything not on that list, it prevents untrusted apps from being installed, even if they come from external sources or malicious links. This direct control over what software is allowed is exactly what stops the installation of potentially harmful apps.

Other controls don’t address this issue as directly: data encryption keeps data safe if someone gains access, but it doesn’t stop apps from being installed; VPN usage secures network traffic but doesn’t regulate the software on the device; password rotation protects credentials but doesn’t restrict which apps can be installed.