IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 22 - 22 of 46

Question number: 22

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Appeared in Year: 2009

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Question

From the following statements identify the disadvantages of scanner.

Choices

Choice (4)Response

a.

Use large memory.

b.

Photo restoration.

c.

Slow.

d.

Both a. and c. are correct

Answer

d.

Explanation

The statement Band D states the disadvantages of scanner.

  • A scanner is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display. Scanners come in hand-held, feed-in, and flatbed types and for scanning black-and-white only, or color.

  • Very high resolution scanners are used for scanning for high-resolution printing, but lower resolution scanners are adequate for capturing images for computer display.

  • Scanners usually come with software, such as Adobe’s Photoshop product, that lets you resize and otherwise modify a captured image. Scanners are usually attached to personal computer with a Small Computer System Interface SCSI.

Image of the Disadvantage

Image of the Disadvantage

Disadvantages:

  • Scanned output quality can vary quite a bit, depending on a number of factors. Some of these factors include the quality of the lens inside the scanner, how clean the scanner glass is and the condition of the original documents

  • Scanner maintenance can be expensive: Many companies uses high-volume scanners to deal with large quantities of paperwork. While these high-volume scanners can be good tools, many business owners do not realize how costly supplies and scheduled maintenance can be. To keep a high volume scanner running at peak performance, owners will need to replace the lamps regularly and perform maintenance on the camera and lens as well.

  • Images produced by the scanner can take up a lot of memory space.

  • Images lose some quality in the scanning and digitizing process.

  • The quality of the final image is dependent on the quality of the original image.

  • Scanners are relatively slow, so companies and individuals user will need to consider the time involved in scanning all of their paperwork. Automatic feeders can help to speed production, but it can still take a great deal of time to scan a stack of documents.

  • Scanner operators will need to carefully check the scanned documents to make sure that all pages have been imaged. It is not unusual for pages to stick together when going through the automatic document feeder, so operators will need to be trained to watch for these problems.

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