Monday, October 29, 2012

PTI - Chapter 4 and 5

Chapter 4
͒͒͒ True or False :
1.       T
2.       F
3.       T
4.       T
5.       F
6.       T
7.       T
8.       T
9.       F
10.   F
11.   F
12.   F
  ͒ Multiple Choice :
1.       B
2.       A
3.       B
4.       B
5.       C
6.       B
7.       A
8.       D
͒  Matching :
1.       H
2.       A
3.       F
4.       B
5.       D
6.       E
7.       G
8.       C
9.       I
10.   J
͒ Short Answer :
1.       2 types of Tablet PC        : With The Slate Tablet PC and A Convertible Tablet PC.

The difference is the display attaches to the system unit with a swivel-type hinge, which enables a user to rotate the display and fold it down over the keyboard to look like a slate Tablet PC. Besides, the slate Tablet PC doesn’t include a keyboard, but there is a keyboard for the convertible Tablet PC. Also, the system unit of the slate Tablet PC is behind the display, but the system unit in the convertible Tablet PC is positioned below a keyboard.

2.       Motherboard    : The electronic components and circuitry of the system unit, such as the processor and memory, usually are part of or are connected to a circuit board.

Computer Chip                 : a small piece of semiconducting material, usually silicon, on which integrated circuits are etched.

3.       4 basic operations            : Fetching, decoding, executing, storing.

The functions of registers are include storing the location from where an instruction was fetched, storing an instruction while the control unit decodes it, storing data while the ALU computes it, and storing the results of a calculation.

4.       Computers, peripherals, smart phones, PDAs, cars, and other consumer electronics.

If we have a computer that is not Bluetooth enabled, we can purchase a Bluetooth wireless port adapter  that will convert an existing USB port into a Bluetooth port.

5.     Compressed air                : to blow away dust from any openings on the computer or device case, such as drives, slots, ports, and fan vents. And lint from difficult-to-reach areas, removes sticky liquid spilled on keyboards.

How to prepare for cleaning our computer : before cleaning the exterior of a computer or mobile device, turn it off, and if necessary, unplug it from the electrical outlet, remove its battery, and disconnect all cables from the ports.

Chapter 5 :

͒ True or False :

1.      T
2.      T
3.      F
4.      T
5.      T
6.      F
7.      F
8.      F
9.      F
10.  T
11.  T
12.  T

͒ Multiple Choice :

1.      C
2.      A
3.      B
4.      C
5.      D
6.      C
7.      C
8.      C

͒ Matching :

1.       B
2.       G
3.       D
4.       J
5.       E
6.       A
7.       H
8.       F
9.       I
10.   C

͒ Short Answer :

1.       3 types of mouse devices : optical mouse, laser mouse, air mouse.

Optical mouse   : devices that emit and sense light to detect mouse’s movement.
Laser mouse      : enabling users to place the mouse on rougher surfaces such as carpeting    and park benches.
Air mouse           : is a motion-sensing mouse allows you to control objects, media players, and slide shows by moving the mouse in predetermined directions through the air.

2.       Point                     : move the mouse until the pointer on the desktop is positioned on the item of choice. Example : position the pointer on the screen.
Rotate wheel     : roll the wheel forward and backward. Example : roll vertically (up and down).
Press wheel       : press the wheel button while moving the mouse. Example : scroll continuously.
Tilt wheel            : press the wheel toward the right or left. Example : scroll horizontally.
Triple-click           : quickly press and release the left mouse button three times without moving the mouse. Example : select a paragraph.

3.       OCR       : can read and convert text documents into electronic files.
OMR      : a technology that reads hand-drawn mark such as small circles or rectangles.

4.       The most widely biometric device today is a fingerprint reader.

A fingerprint reader, or scanner, captures curves and indentations of a fingerprint. 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.       ADA is a wide-ranging civil rights law that prohibits, under certain circumstances, discrimination based on disability.

With gesture recognition, the computer will detect human motions. 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.

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