Which of the following devices is best for that room?

You work as a Chief Security Officer for Tech Perfect Inc. The company has an internal room without
any window and is totally in darkness. For security reasons, you want to place a device in the room.
Which of the following devices is best for that room?

A.
Photoelectric motion detector

B.
Badge

C.
Closed-circuit television

D.
Alarm

Explanation:
According to the given scenario, a photoelectric motion detector is best for the security
reasons. Photoelectric motion detector is a security
device that experiences changes in the levels of visible lights of the motioned area. It is placed in
those internal rooms that do not have any
windows and are totally in darkness.
Answer option B is incorrect. A badge is a device or accoutrement that is presented or displayed to
indicate some feat of service, a special

accomplishment, a symbol of authority granted by taking an oath, a sign of legitimate employment
or student status, or as a simple means of
identification. It is also used in advertising, publicity, and for branding purposes.
A badge can be made from metal, plastic, leather, textile, rubber, etc., and it is commonly attached
to clothing, bags, footwear, vehicles, home
electrical equipment, etc.
Answer option D is incorrect. An alarm is a device that triggers a deterrent, a repellent, and a
notification.
Answer option C is incorrect. Closed-circuit television (CCTV) is a device that uses video cameras to
transmit a signal to a specific place, on a
limited set of monitors. It differs from broadcast television in that the signal is not openly
transmitted, though it may employ point to point
wireless links. CCTV is often used for surveillance in areas that may need monitoring such as banks,
casinos, airports, military installations,
and convenience stores.