Question

What does closed-circuit television do?
A. Helps in forming computational tasks
B. Helps in writing
C. Enlarges printed materials
D. Helps in calculation

Answer 1

Hint: CCTV stands for closed-circuit television and is usually referred to as video surveillance. Closed-circuit defines broadcasts are usually transmitted to a specified number of monitors, unlike “regular” TV, which is broadcast to the general public at large. CCTV networks are used to detect and also deter criminal activities and record traffic infractions, but they also have other uses.

Complete step by step answer:
CCTV is the use of video cameras to transmit a signal to a selected place, on a few sets of monitors. It differs from broadcast television in that the signal isn’t openly transmitted, though it can employ point to single-point, point to multipoint, or mesh wireless links. Though the majority of video cameras fit this definition, the term is most frequently applied to those used for surveillance in areas that will need monitoring like banks, casinos, airports, military installations, and convenience stores. Videotelephony is seldom termed "CCTV" but the employment of video in distance education, where it’s a crucial tool, is commonly so-called. In industrial plants, CCTV equipment is also accustomed to observe parts of a process from a central control room, as an example when the environment isn’t suitable for humans. Closed Circuit Television systems can operate continuously or only as required to monitor a specific event. A more advanced style of Closed Circuit Television, utilizing digital video recorders, provides recording for possibly for a few years, with a spread of quality and performance options and additional features. More recently, decentralized IP-based CCTV cameras, some equipped with megapixel sensors, support recording directly onto network-attached storage devices, or internal flash for completely stand-alone operation. Surveillance of the general public using CCTV is especially common in few areas around the world including the United Kingdom, where there are reportedly more cameras per person than in other countries within the world. There et al, its increasing use has triggered a debate about security versus privacy.

So, the correct answer is “Option C”.

Note: CCTV technology was first developed in 1942 by German scientists to watch the launch of V2 rockets. It had been later utilized by American scientists during the testing of the atomic bomb. Analogy and digital systems work quite differently but modern CCTV networks use conversion software and hardware to convert analogies to digital. This process is termed retrofitting.