The Answer of Chapter 5 (PTI)

a. True/false
• T
• T
• F
• T
• T
• F
• F
• F
• F
• T
• F
• T

b. Multipe Choice
• C
• A
• B
• C
• D
• C
• C
• C

c. Mtching
• B
• G
• D
• J
• E
• A
• H
• F
• I
• C

d. Short Answer

1.    1. What are three different types of mouse devices?

= laser mouse, air mouse, and wireless mouse.

What makes them different from each other?

=               -    Laser mouse

         =uses a laser to detect movement of the mouse. It also includes buttons you push with your thumb that enable forward and backward navigation through Web pages.

-       Air mouse

= is a motion-sensing mouse that, in addition to the typical buttons, allows you to control objects, media players, and slide shows by moving the mouse in predetermined directions through the air.

-       Wireless mouse

=is a battery-powered device that transmits data using wireless technology, such as radio waves (Bluetooth) or infrared light waves (IrDA).

           

2.  2.   Name at least five mouse operations!

= Point, click, right-click, double-click, drag.

Describe and give examples of each of the mouse operations that you chose!

=                -    Point

                        Move the mouse until the pointer on the desktop is positioned on the item of choice.

             Example: Position the pointer on the screen.

-       Click

Press and release the primary mouse button, which usually is the left mouse button.

Example: Select or deselect items on the screen or start a program or program feature.

-       Right-Click

Press and release the secondary mouse button, which usually is the right mouse button.

Example: Display a shortcut menu

-       Double-Click

Quickly press and release the left mouse button twice without moving the mouse.

Example: Start a program or program feature.

-       Drag

Point to an item, hold down the left mouse button, move the item to the desired location on the screen, and then release the left mouse button.

Example: Move an object from one location to another or draw pictures.

3.     3.What is OCR (optical character recognition)?

= is a technology that involves reading typewritten, computer printed, or hand-printed characters from ordinary documents and translating the images into a form that the computer can process.

What is OMR (optical mark recognition)?

= is a technology that reads hand-drawn marks such as small circles or rectangles.

4.     4. What is the most widely used biometric device today?

= fingerprint reader.

Describe how the device works!

=The reader can be set up to perform different functions for different fingers. For example, one finger starts a program and another finger shuts down the computer.

5.  5.   What are the Americans with Disabilities Act (ADA)?

=ADA is a structured, statically typed, imperative, wide-spectrum, and object-oriented high-level computer programming language, extended from Pascal and other languages. It has strong built-in language support for explicit concurrency, offering tasks, synchronous message passing, protected objects, and non-determinism (source:wikipedia), and it also requires any company with 15 or more employees to make reasonable attempts to accommodate the needs of physically challenged workers.

How might gesture recognition and computerized implant devices help physically challenged users in the future?

= Computers with gesture recognition capability have the potential to recognize sign language, read lips, track facial movements, or follow eye gazes. For paralyzed or speech impaired individuals, a doctor will implant a computerized device into the brain.