NCIDQ IDFX Practice Exam

What is the function of a numbered keyboard in access control systems?

1. It allows users to unlock doors by presenting cards

2. It provides a coded access for residents in a hotel

3. It unlocks a door when the correct numerical code is inputted

4. It retracts bolts to open doors electronically

The correct answer is: It unlocks a door when the correct numerical code is inputted

The function of a numbered keyboard in access control systems is primarily to unlock a door when the correct numerical code is inputted. This type of access control is often referred to as a keypad entry system, where users need to remember a specific code to gain access. The design adds a layer of security by requiring knowledge of the code, rather than physical items like keys or cards, which can be lost or stolen. In contrast, the other responses highlight different aspects of access control systems. For example, unlocking doors via card presentation focuses on proximity or card-based systems instead of numerical entry. Providing a coded access for residents in a hotel may refer to a similar concept, yet it doesn't exclusively highlight the keypad's function. Lastly, retracting bolts to open doors electronically pertains to the mechanical aspect of door systems, which does not involve user input through a numbered keyboard. Thus, the correct answer emphasizes the specific role of a keypad as a means of inputting a code for secure access.