Accuracy of data input is important. What method of data input would be best for each of the following situations and why: * Printed Questionnaires: * Keyboard and mouse * User can type data using the keyboard and use the mouse to click/select pieces of data * Telephone Survey: * Voice input device * Surveys may be set up to function using voice recognition for users responding to a fixed set of questions * Bank Checks: * MICR (Magnetic Ink Character Recognition) * The characters encode the account number, bank transit and check number, usually processed automatically. Retail Tags: * POS (Point of Sale) System * Manages the selling process from an accessible salesperson interface and allows for the creation and printing of receipts. The device may have a barcode scanner that contains information for a specific product, which is useful for pricing and inventory details. * Long Documents: * Optical Data Reader * A scanner identifies the characters and ava Convenience and quality of output are important. Explain what method of output would be best for each of the following situations and why: * Hand-held computer: * Visual output (i. . – LCD monitor) * LCD (Liquid Crystal Display) monitors are ideal for laptop computers for the output of text or low resolution graphics using smaller display sizes * Color Photograph: * High Resolution Printer * Using photo paper, high resolution printers can be used to produce multicolor images using different dimensions * Resume: * Printed Hardcopies or Email Attachments * Resumes usually do not contain graphics, so printing hardcopies containing only text is allowable. When applying to multiple businesses, sending resumes electronically is ideal. Memorandum: * Email or Instant Messaging * Using digital copies saves time and money. It also provides a higher degree of certainty that the targeted readers will receive the information * Statistical Report: * Plotter or Printer * Plotter is ideal for reports containing various graphics, such as charts. Plotters can also be used for projection displays when addressing a large group * Company Annual Report: * Intranet Web Page or Printer * Intranet Web pages are useful for quick electronic access for referencing
Different types of storage devices are optimal for different situations. Explain what situations are appropriate for the following devices and why: * Hard Disk: * Used to store information that can be frequently accessed with ease. Hard disks are available in multiple storage capacities to suit the user’s storage needs. The data can be copied, modified or deleted using hard disks. * Floppy Disk: * Small, portable magnetic storage devices with smaller storage capacities than hard disks (typically 1-2 MB). Floppy disks are used to transport smaller files, such as text documents. * RAM: RAM, or Random Access Memory, temporarily stores data from a hard disk that the computer accesses frequently, such as execution paths for loading web browser content. * CD ROM: * CD ROM, or Compact Disk Read Only Memory, is an optical disk that stores data for frequent use. The most common examples are audio/music files or software installation files. * Tape: * Tapes are used for backing up data for recovery in case of a system failure * Flash or Jump Drive: * Small data storage devices similar to floppy disks that are accessible using USB ports for the use of smaller files.
Explain the role of each of the following in determining the speed of a computer: * RAM: * Increases computer speed by allowing the computer to bypass accessing the hard disk each time for data during the execution of a process. * Clock Speed: * Number of electronic pulses generated by an oscillator of the CPU. The more pulses, the faster the CPU. * Data on Hard Disk: * CPU will run slower with an increasing amount of data contained on the hard disk * Data on CD ROM: * The more data contained on the disk, the longer the executing process will take * Data on Floppy Disk: * Same effects as data on hard disks and CD ROMs