1.
The difference between a raster and a vector device is that
Correct Answer
C. A raster device treats the output as a whole whilst a vector device treats the global output as being made up out of a number of different parts. So vector devices produce complete lines whilst raster devices produce images as a series of dots.
Explanation
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.
2.
Pen Plotters are ideal for
Correct Answer
B. Producing maps
Explanation
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.
3.
Which of the following is/are impact printers?
Correct Answer
A. The the dot matrix printer
Explanation
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.
4.
Printer resolution is measured in
Correct Answer
B. Dpi
Explanation
dpi stands for 'dots per inch'
5.
A flat panel display monitor like an LCD
Correct Answer
D. Has a lower power consumption than CRT monitors.
Explanation
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.
6.
Which of the following printers is/are suitable for printing photos?
Correct Answer
C. Inkjet printer, laser printer
Explanation
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.
7.
Which of the following devices produce a softcopy?
Correct Answer
A. CRT monitors, LCD monitors
Explanation
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.
8.
Why is buffering often necessary when the computer is accessing a slower device like a printer?
Correct Answer
B. Because buffering frees the CPU to do other things while printing or accessing other i/o devices
Explanation
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.
9.
Which of the following are all output devices?
Correct Answer
B. CRT monitor, laser printer, Pen plotter
Explanation
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.
10.
How does a hardcopy differ from a softcopy?
Correct Answer
D. A hardcopy is permanent and tangible whilst a softcopy is not tangible and can be easily changed.
Explanation
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.