A451: Test Questions 8/12/13

Question 0

What is meant by a 3Mhz CPU?

Answer 0

3mhz is the speed of the processor

This means it is doing 3,000,000 instructions per second

Question 1

What is the purpose of a CPU?

Answer 1

The purpose of a CPU is to fetch and execute instructions.

Question 2

What is meant by a quad-core CPU

Answer 2

This is four CPU’s in one.

It can perform four times more instructions then a single core processor.

Question 3

What would a text document be stored in?

Answer 3

Kilobytes

Question 4

What would a large movie cli be stored in?

Answer 4

Megabytes

Question 5

What would a persons surname be stored in?

Answer 5

Bytes

Question 6

How many gigs in a terrabyte?

Answer 6

1000gb

Question 7

Not and or gates?

Answer 7

REFER TO NOTES IN FOLDER

Question 8

Why is hexadecimal numbers often used to represent binary.

Answer 8

This is because the conversions are easier

It is also a lot easier for humans to read

Question 9

What is an input device needed by the computer?

Answer 9

Mouse/keyboard

Question 10

Why do you need a keyboard or mouse?

Answer 10

To enter select information.

To be able to navigate round the computer

Question 11

What is an output devise that you will need from the computer?

Answer 11

Monitor, because the image needs to be viewed also to display computer information to navigate.

Question 12

What storage device would you use for video?

Answer 12

Magnetic drive, this is so information can be saved and viewed at a later date. It is also cheap and reliable compared to alternatives

Question 13

How is ASCII used to represent a text in a computer system?

Answer 13

Computers can’t store letters, they can only store numbers. So they could only be stored as binary because computers can only use binary

Question 14

What is meant by a character set?

Answer 14

This is a group of characters such as A,B,C,D,E,F

Question 15

What is the difference between unicode and ASCII

Answer 15

This is because unicode has many more languages available so it is universal, it also contains a lot more expressions so it is bigger.

Question 16

What is the purpose of the RAM in a computer?

Answer 16

Information is stored in the Ram when it is being used. Programmes and data that are being worked on by the processor

Question 17

What is meant by virtual memory?

Answer 17

Virtual memory is for when space for programs or data runs out in the RAM, to make more space the computer will put one of the programs or data that is currently into the RAM, onto the hard dive in a special place. When these programs are needed again, they switch back.

Question 18

Why is virtual memory needed?

Answer 18

Virtual memory is needed so that programs can be paused to make more room on the RAM to use more programs.

Question 19

How will upgrading the RAM increase the performance of your computer?

Answer 19

You will not need to use virtual memory as much so the computer will speed up.
It will also increase the amount of programs you can open at once.