Tuesday, January 17, 2012

Practice for IB exam question

Bank offering online services
  1. Give examples
    1. Online bill payment
    2. Checking balance, credit card bill, mortgage bills
    3. Cashing checks online
    4. Wiring money
  2. Evaluate the IT system
    1. Costs
      1. Possible security risks
      2. Dependent on system being up at all times
    2. Benefits
      1. More convenient
      2. Easy access to bills, money
      3. Easier to pay bills on time b/c no chance of lost in mail
      4. More secure than mailing checks
  3. S+E issues
    1. Reliability: has to be up all the time to work
    2. Integrity: data loss that destroys a bank account would be catastrophic
    3. Security: critical to ensure no-one steals users' account information and then their money
    4. Authenticity: making sure everyone who logs into an account is actually the account holder
    5. People and Machines: some people might not like being forced to use an online system
    6. Privacy and Anonymity: protecting user information
    7. Control: who can access, and when
Multimedia + Education
  1. Define pixel
    1. A point on the screen which varies in color to change the appearance of something.  More and smaller pixels equal higher resolution.
  2. Define resolution
    1. The number of pixels in an image.  Lower resolution means a blurry image, while high resolution results in a sharp, clear picture.
  3. School often use images to present historical topics.  Many of these images are copyrighted works of famous artists.  A class of ITGS students is asked to manipulate these images to change how history is presented.  Consider the following:
    1. Describe the process of editing an image.
      1. First, take the image and import it into a photo editing system.  Then, use the program to move the pixels around and recolor them until the image looks like you want it to.
    2. Does it fall under fair use?
      1. As long as it is not resold, it is for educational purposes and therefore is fair use.
    3. What social/ethical considerations should be made?
      1. Do not resell the image, cite who made it in the first place, make it clear that this is not legal outside of an educational setting.
  4. Bonus question: what does GIF stand for and what is it?
    1. Graphical Interchange Format.  A file format of images, best resolution.