NCIDQ IDFX 2026 – 400 Free Practice Questions to Pass the Exam

Interlocking dead bolts function as access control devices by securing the door bolt to prevent disengagement. This mechanism enhances the security of a door by requiring both bolts to engage for the door to be secured properly. When both components interlock, it creates a stronger barrier against unauthorized access, as it is much more difficult for someone to force open the door. This feature is particularly effective in improving the security of residential and commercial spaces, as it ensures that the door remains fully locked and cannot be easily compromised.

The other options focus on different types of detection and sensing technologies that do not apply to the specific functionality of interlocking dead bolts, which are primarily mechanical locking mechanisms rather than electronic or sensor-based devices.