Name and describe three assistive input devices.
What will be an ideal response?
Braille keyboards—large-key keyboards, or conventional keyboards with Braille or large-print key overlays are available for visually impaired computer users. Keyguards—metal or plastic plates that fit over conventional keyboards— enable users with limited hand mobility to press the keys on a keyboard, using his or her fingers or special device, without accidentally pressing other keys. One-handed keyboards—available for users who have the use of only one hand. Switches—hardware devices that can be activated with hand, foot, finger, or face movement, or with sips and puffs of air—can be used to input commands into a computer. Assistive pointing devices—used to move and select items, can be used to enter text-based data when used in conjunction with an on-screen keyboard, examples include foot-controlled mice, head pointing systems, eye tracking systems.
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Design an algorithm for incremental maintenance of a join index for a multiway star join.
What will be an ideal response?
When an image is selected and the Crop button clicked ________
A) cropping handles appear on the edges of the image B) the image is reduced to fit the placeholder on the slide C) the image size is reduced by 25% D) the image size is reduced by 50%
When the _____ logical operator is used to combine terms, a search engine will retrieve all results containing either term.
A. OR B. AND C. IF D. NOT
The "fathers of the Internet" are Vinton Cerf and ________.
A. Robert Cailliau B. Tim Berners-Lee C. Bill Gates D. Robert Kahn