Computing

HideShow resource information
  • Created by: masterrig
  • Created on: 05-07-14 14:05
NOT gate input is 0,What is the output?
1
1 of 20
How would installing extra RAM affect the use of virtual memory and what effect does this have on the performance of the PC?
More RAM means that virtual memory use is reduced which improves the performance of the PC.
2 of 20
What is the purpose of a CPU?
to fetch and execute instructions and perform arithmetic and logical operations via the ALU
3 of 20
What is meant by '2.5MHz quad core' when describing a processor?
2.5 million instructions can be processed per second or 2.5 million cycles per second. Quad core means that there are 4 independent processors working together.
4 of 20
One advantage of a dual core processor over a single core.
A dual-core processor can process data simultaneously, so it is faster.
5 of 20
2 disadvantages of a dual-core processor over a single core.
A more complicated operating system is needed and it is harder to write software for multiple processors.
6 of 20
Why is cache memory used?
to make access to data faster.
7 of 20
what are disadvantages of Cache?
very expensive and very small in size
8 of 20
What does the control unit do?
controls the flow of data within the CPU
9 of 20
The speed at which a CPU can process data depends on:
The CPU clock or processor speed,cache memory, the number of processor cores
10 of 20
Name 2 input devices that aren't for the disabled and state their job
Keyboard:used for data entry into a computer,mouse:controls a pointer on the screen that can be opened,dragged or controlled by clicking buttons on the mouse,touchscreen:allows the user to interact directly with icons or an on-screen keyboard
11 of 20
Name 2 input devices that are for the disabled and state their job
Eye-typer: can be used by people with limited physical mobility(more on revision card),foot mouse:can be used by those with limited hand movement(more on revision card)
12 of 20
state 2 output devices
Monitor the most common way of displaying text,images and video(more on revision card),printer:produces hard copy on paper(more on revision card)
13 of 20
Identify,with reasons, 3 devices that would help a visually impaired person to use a PC
Braille keyboard – raised dots to identify symbols; speaker and voice synthesis to read documents; microphone with voice recognition to issue commands
14 of 20
Why does a PC need secondary storage?
To store data and programs when the power is switched off
15 of 20
What does a magnetic hard disk store?
The operating system,installed programs and user data
16 of 20
advantages of magnetic hard disk
reliable,high capacity,low cost
17 of 20
advantages of optical disk
good capacity,low cost,lightweight and portable
18 of 20
flash memory is:
good capacity(but less max capacity than a hard disk),used in hand held devices,more expensive than a hard disk
19 of 20
main considerations when selecting storage
capacity,speed,portability,durability,reliability
20 of 20

Other cards in this set

Card 2

Front

How would installing extra RAM affect the use of virtual memory and what effect does this have on the performance of the PC?

Back

More RAM means that virtual memory use is reduced which improves the performance of the PC.

Card 3

Front

What is the purpose of a CPU?

Back

Preview of the front of card 3

Card 4

Front

What is meant by '2.5MHz quad core' when describing a processor?

Back

Preview of the front of card 4

Card 5

Front

One advantage of a dual core processor over a single core.

Back

Preview of the front of card 5
View more cards

Comments

arjunsh66

good resource

Similar Computing resources:

See all Computing resources »See all Hardware resources »