Test Your Knowledge On Output Devices

dpi stands for 'dots per inch'

Buffering is often necessary when the computer is accessing a slower device like a printer because it allows the computer's CPU to perform other tasks while waiting for the slower device to complete its operations. By temporarily storing data in a buffer, the CPU can continue executing other instructions instead of being idle and waiting for the printer to finish. This improves overall system efficiency and allows for multitasking, as the CPU can handle multiple operations simultaneously.

Pen plotters are ideal for producing maps because they are capable of creating precise and detailed drawings. Maps require accurate representation of geographical features and pen plotters can achieve this by using pens of various colors and thicknesses. The plotters can also handle large paper sizes, allowing for the creation of maps with extensive coverage. Additionally, pen plotters can produce high-quality prints with smooth lines and consistent shading, making them suitable for producing maps that are visually appealing and easy to interpret.

The inkjet printer and laser printer are suitable for printing photos because they both have the capability to produce high-quality images with vibrant colors and sharp details. Inkjet printers use liquid ink that is sprayed onto the paper, resulting in smooth color transitions and accurate color reproduction. Laser printers, on the other hand, use toner and heat to fuse the image onto the paper, providing crisp and precise prints. Both printers offer the necessary resolution and color accuracy required for printing photos.

The correct answer states that a raster device treats the output as a whole, while a vector device treats the global output as being made up of different parts. This means that vector devices create complete lines, while raster devices produce images as a series of dots. This explanation highlights the fundamental difference between raster and vector devices in terms of how they handle and represent output.

The correct answer is CRT monitor, laser printer, and Pen plotter. These devices are all output devices because they are used to display or produce information from a computer system. A CRT monitor is a display device that shows visual output, a laser printer produces printed output, and a Pen plotter is a device that uses pens to draw graphics or designs on paper.

CRT monitors and LCD monitors both produce a softcopy. A softcopy refers to the electronic version of a document or image that is displayed on a screen. CRT monitors use cathode ray tubes to display images, while LCD monitors use liquid crystal displays. Both types of monitors can display digital content and do not require physical printing, making them softcopy devices.

The dot matrix printer is an impact printer because it uses a print head that strikes against an ink ribbon to create characters on the paper. The impact of the print head against the ribbon transfers ink onto the paper, creating the printed text or images. This is in contrast to non-impact printers like inkjet printers and laser printers, which use different methods such as spraying ink or using lasers to create prints.

A hardcopy refers to a physical printout or document that can be held and touched, making it permanent and tangible. On the other hand, a softcopy is a digital or electronic version of a document that is not tangible and can be easily modified or edited.

An LCD monitor has a lower power consumption than CRT monitors. This means that it requires less electricity to operate, resulting in lower energy costs and a smaller environmental impact. LCD monitors use a backlight to illuminate the screen, while CRT monitors use electron beams to create images. The use of a backlight in LCD monitors is more energy-efficient compared to the power-hungry electron beams used in CRT monitors. Therefore, choosing an LCD monitor over a CRT monitor can help save energy and reduce electricity consumption.