More about hardware

Question 1

Pointing devices

Answer 1

• These are input devices that allow a user to control the cursor on computer screen
• Examples include : touch pad, trackball, pointing stick

Question 2

OMR scanners

Answer 2

• Optical Mark Recognition
• these scanners identify and record certain marks made on paper
• E.g lottery tickets

Question 3

OCR scanners

Answer 3

• Optical Character Recognition

- computers recognize text characters on scanned image and convert them into electronic files

Question 4

Biometric input

Answer 4

• Allows a unique biological feature of a person to be used as a password or in access control
• Examples are : fingerprints, handprints, voice recognition and scanning the iris of your eye.

Question 5

Memory cards

Answer 5

• form of storage for digital cameras and cell phones
• has no moving parts
• ideal for portable devices

Question 6

USB flash drives

Answer 6

• electronic storage medium that plugs into a USB port

- store large amounts of data

Question 7

CPU

Answer 7

• Central Processing Unit
• Executes the instructions given to the computer
• Receives and sends instructions to and from other components.
• Speed is measured in gigahertz (GHz).

Question 8

RAM

Answer 8

• Random Access Memory
• Stores data temporarily
• Volatile memory (is lost when the supply of
  electricity is lost)
• ## Primary memory

Question 9

ROM

Answer 9

• Read-Only Memory

- Information on a ROM chip cannot be changed without a special device