Chapter 5 - Computer hardware Flashcards Preview

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Flashcards in Chapter 5 - Computer hardware Deck (15)
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1
Q

What are the three parts of the CPU ?

A

1 - control unit
2 - Arithmetic logic unit
3 - Immediate access store

2
Q

What is the main role of the CPU ?

A

To process programs and data

3
Q

What does the CU do ?

A
  • decides which instruction to carry out next
  • fetches it from memory
  • repeats the fetch-execute cycle
4
Q

What does the ALU do ?

A
  • carries out maths equations
5
Q

What does the IAS do ?

A
  • stores all programs and data while they are in use
6
Q

What are the 5 registers of the CPU ?

A
  • program counter
  • memory address register
  • memory data register
  • instruction register
  • accumulator
7
Q

What does clock speed mean ?

A

The number of instructions the CPU can deal with per second

8
Q

What does the cache do ?

A

temporarily stores frequently used instructions and data

9
Q

What is a processor core ?

A

A core is a single processor

10
Q

Name 5 computer hardware devices :

A
  • graphics digitiser
  • speaker
  • mouse
  • 3D printer
  • Hard disk drive
11
Q

Whats the purpose of a graphics digitiser ?

A

allows a user to hand draw images. Consists of a flat pad and a stylus

12
Q

Describe how HD storage media works

A

uses laser technology to store and retrieve data at high data transfer speed to and from optical disks.

13
Q

Describe the features of SSD storage:

A
  • It’s flash memory
  • usb memory sticks are a type of SSD
  • plug and play devices
14
Q

Describe the features of RAM memory

A
  • volatile
  • read from or written to
  • stores the programs that the user is currently using
  • more RAM = faster processing speeds
15
Q

Describe the features of ROM :

A
  • read from but not written to

- used to store BIOS