Computer Science GCSE Josh M

Question 1

what are the different storage units?

Answer 1

Bit, Nibble - (4 bits), 
Byte - (8 bits), 
KiloByte - (1000 bytes), 
MegaByte - (1000 KiloBytes), 
GigaByte - (1000 MegaBytes), 
TeraByte - (1000 GigaBytes), 
PetaByte - (1000 TeraBytes).

Question 2

what is cloud storage?

Answer 2

Off-Site storage that is accessed over a network (usually the internet).

Question 3

what is flash memory?

Answer 3

Memory that is programmed electrically but is non-volatile.

Question 4

what is cache memory?

Answer 4

A temporary data store which can be accessed very quickly.

Question 5

what is volatile and non-volatile?

Answer 5

volatile is when the storage can be lost as soon as the power, and non volatile is when it cant be lost as long as its saved.

Question 6

what is a central processing unit?

Answer 6

Component of the computer that controls the other devices, executes instructions and processes the data.

Question 7

what is an Embedded system?

Answer 7

Computer system that is built within a larger device such as a washing machine or alarm system.

Question 8

how does a cd store information?

Answer 8

It creates pits in tracks around the center of the disk in a spiral pattern which are then shot at by a laser and the computer will see how its reflected, and will decide weather its a 1 or a 0.