Computer & IT

note!Answer: B) Touch screen
A touch screen uses sensors on the display to detect the touch of a finger. The light pen detects light, and the pointing stick and joystick are not touch-sensitive displays.

note!Answer: A) Light pen
A light pen is a light-sensitive stylus that detects light from the screen to select or draw on it. The other options are not light-sensitive styluses.

note!Answer: B) Fax machine
MICR, OMR and OCR are all mark or character recognition devices. A fax machine transmits documents and does not recognize marks or characters.

note!Answer: C) Universal Product Code
The bar code system is the Universal Product Code (UPC), used to identify products through printed bars. ASCII, EBCDIC and Unicode are character encoding schemes, not bar code systems.

note!Answer: D) Bar code
Vertical light and dark stripes printed on products are called bar codes. They are read by scanners to identify the product.

note!Answer: A) MICR
MICR (Magnetic Ink Character Recognition) reads characters printed with magnetized ink, mainly on bank cheques. It is the standard device for this task.

note!Answer: D) OMR
OMR (Optical Mark Reader) detects marked positions on forms, such as answer sheets, and is used to check and process test marks.

note!Answer: B) Smart card
A SIM card is a smart card, which contains a chip for storing and processing data. Magnetic stripe cards store data only in a magnetic strip.

note!Answer: C) Microphone
A microphone converts sound into electrical signals, so it is an audio input device. VCR and video camera are video devices, and a speaker is an output device.

note!Answer: C) OMR
OMR is used for standardized tests such as the SAT because it reads marks made in fixed positions on answer sheets.

note!Answer: D) Digital
A digital camera records images electronically on a storage medium such as a disk or memory, not on photographic film.

note!Answer: A) Webcam
A webcam is a video camera that captures and transmits images over the Internet, often for live broadcasting.

note!Answer: D) Digitizing
Digitizers convert drawings, sketches, or figures into digital data that a computer can process. Plotters do the opposite, producing output on paper.

note!Answer: C) Graphics tablet
A stylus is a special pen used to write or draw on a digital surface.

-> A Scanner does not need a stylus. It scans papers using light.
-> A Digital notebook can sometimes use a stylus, but it is not the main classic example.
-> A Graphics tablet (also called digitizer tablet) is specially made for drawing. You must use a stylus (pen) on its surface to draw or write.
- A Bar-code reader does not need a stylus. It reads barcodes with a laser or light sensor.

So, the device that requires the use of a stylus is the Graphics tablet.

note!Answer: D) Thermal
Thermal printers need special heat-sensitive paper that darkens when heated. Chain, laser, and ink-jet printers use ordinary paper.

note!Answer: C) Plotter
Plotters are designed to produce very large drawings, such as engineering and architectural plans. The other printers are generally limited to standard paper sizes.

note!Answer: D) Right mouse button
Clicking the right mouse button opens the shortcut (context) menu in most operating systems and applications.

note!Answer: D) Internet telephones
Internet telephones are specialized input and output devices used for receiving and sending voice communications over the Internet. They use Internet Protocol (IP) technology to transmit voice signals, allowing people to make and receive calls through an Internet connection.

note!Answer: D) Thin client
A network terminal is also known as a thin client. It is a computer or device that relies mainly on a central server to perform processing tasks, run applications, or store data. It typically has limited local processing and storage capabilities and accesses resources over a network.
Example: A computer in an office that connects to a central server to run applications and access shared files.

note!Answer: C) Intelligent terminal
An intelligent terminal is a terminal that has its own processing capabilities and can perform certain tasks independently. A standard microcomputer (PC) connected to a network is considered an intelligent terminal because it can process data locally while also communicating with other computers on the network.
Example: A desktop computer connected to an office network that can run software, process data, and access shared files on a server.