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Прочитайте текст и ответьте на вопрос: What is optic-electronic scanner used for The purpose of the ...: ответ на тест 911617 - Английский язык

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What is optic-electronic scanner used for?
The purpose of the input hardware is to collect data and convert it into a form suitable for computer processing. The most common input device is a keyboard. It looks very much like a typewriter. The mouse is a hand held device connected to the computer by small cable. As the mouse is rolled across the mouse pad, the cursor moves across the screen. When the cursor reaches the desired location, the user usually pushes a button on the mouse once or twice to signal a menu selection or a command to the computer.
The light pen uses a light sensitive photoelectric cell to signal screen position to the computer. Another type of input hardware is optic-electronic scanner that is used to input graphics as well as typeset characters. Microphone and video camera can be also used to input data into the computer. Electronic cameras are becoming very popular among the consumers for their relatively low price and convenience.
Варианты ответов
  • It is used to input data into the computer.
  • It is used to signal screen position to the computer.
  • It is used to signal a menu selection or a command to the computer.
  • It is used to input graphics and typeset characters.
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 16:10
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 16:10

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Вопрос № 1105214

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Computer systems can be discussed in two parts: hardware and software. The hardware is physical, electronic, and electro-mechanical devices. The hardware consists of Central Processing Unit (CPU), input devices and output devices. Input devices are used to provide data for the CPU. The keyboard is a common data input device. Data is sometimes entered on cards. The cards are read by an input device called a card reader. Output devices receive data from the CPU. The visual display unit (VDU) and printers are common output devices. Input devices, output devices and mass storage devices are collectively called Input-Output Devices, or peripherals. The software contains the programmes that control and coordinate the activities of the computer hardware and direct the processing of data.
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The cards are read by an input device called …
the CPU
the visual display unit
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Вопрос № 1072600

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Computer systems can be discussed in two parts: hardware and software. The hardware is physical, electronic, and electro-mechanical devices. The hardware consists of Central Processing Unit (CPU), input devices and output devices. Input devices are used to provide data for the CPU. The keyboard is a common data input device. Data is sometimes entered on cards. The cards are read by an input device called a card reader. Output devices receive data from the CPU. The visual display unit (VDU) and printers are common output devices. Input devices, output devices and mass storage devices are collectively called Input-Output Devices, or peripherals. The software contains the programmes that control and coordinate the activities of the computer hardware and direct the processing of data.
Закончите предложение:
The cards are read by an input device called …
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Вопрос № 911618

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What is CD-ROM used for?
The purpose of storage hardware is to store computer instructions and data in a form that is relatively permanent and retrieve when needed for processing. Storage hardware serves the same basic functions as do office filing systems except that it stores data as electromagnetic signals. The most common ways of storing data are hard disk, floppy disk and CD-ROM.
Hard disk is a rigid disk coated with magnetic material, for storing programs and relatively large amounts of data.
Floppy disk (diskette) – thin, usually flexible plastic disk coated with magnetic material, for storing computer data and programs.
CD-ROM (compact disc read only memory) is a compact disc on which a large amount of digitized read-only data can be stored.

Вопрос № 911619

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What is modem used for?
The purpose of output hardware is to provide the user with the means to view information produced by the computer system. Information is output in either hardcopy or softcopy form. Hardcopy output can be held in your hand, such as paper with text (words or numbers) or graphics printed on it. Softcopy output is displayed on a monitor.
Monitor is a component with a display screen for viewing computer data, television programs, etc.
Printer is a computer output device that produces a paper copy of data or graphics.
Modem is an example of communication hardware – an electronic device that makes possible the transmission of data to or from computer via telephone or other communication lines.

Вопрос № 911620

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What are the computer programs used for?
A computer to complete a job requires more than just the actual equipment or hardware we see and touch. It requires software – programs for directing the operation of a computer or electronic data.
Software is the final computer system component. These computer programs instruct the hardware how to conduct processing. The computer is merely a general-purpose machine which requires specific software to perform a given task. Computers can input, calculate, compare, and output data as information. Software determines the order in which these operations are performed.
Programs usually fall in one of two categories: system software and applications software.

Вопрос № 911621

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What is system software used for?
System software controls standard internal computer activities. An operating system, for example, is a collection of system programs that aid in the operation of a computer regardless of the application software being used. When a computer is first turned on, one of the systems programs is booted or loaded into the computer’s memory. This software contains information about memory capacity, the model of the processor, the disk drives to be used, and more.
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