A451: Test Questions 8/12/13 Flashcards
What is meant by a 3Mhz CPU?
3mhz is the speed of the processor
This means it is doing 3,000,000 instructions per second
What is the purpose of a CPU?
The purpose of a CPU is to fetch and execute instructions.
What is meant by a quad-core CPU
This is four CPU’s in one.
It can perform four times more instructions then a single core processor.
What would a text document be stored in?
Kilobytes
What would a large movie cli be stored in?
Megabytes
What would a persons surname be stored in?
Bytes
How many gigs in a terrabyte?
1000gb
Not and or gates?
REFER TO NOTES IN FOLDER
Why is hexadecimal numbers often used to represent binary.
This is because the conversions are easier
It is also a lot easier for humans to read
What is an input device needed by the computer?
Mouse/keyboard
Why do you need a keyboard or mouse?
To enter select information.
To be able to navigate round the computer
What is an output devise that you will need from the computer?
Monitor, because the image needs to be viewed also to display computer information to navigate.
What storage device would you use for video?
Magnetic drive, this is so information can be saved and viewed at a later date. It is also cheap and reliable compared to alternatives
How is ASCII used to represent a text in a computer system?
Computers can’t store letters, they can only store numbers. So they could only be stored as binary because computers can only use binary
What is meant by a character set?
This is a group of characters such as A,B,C,D,E,F
What is the difference between unicode and ASCII
This is because unicode has many more languages available so it is universal, it also contains a lot more expressions so it is bigger.
What is the purpose of the RAM in a computer?
Information is stored in the Ram when it is being used. Programmes and data that are being worked on by the processor
What is meant by virtual memory?
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.
Why is virtual memory needed?
Virtual memory is needed so that programs can be paused to make more room on the RAM to use more programs.
How will upgrading the RAM increase the performance of your computer?
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.
