Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
|
Read Only Memory (ROM)
|
- Description
-- Non-volatile -- Contents of memory not erased when turned off -- Memory contents can not be altered/changed - Type of software stored -- Contains the boot program (start-up software) - Reason -- Program is required immediately when power is switched on -- Therefore the boot program must be in the ROM |
|
|
Random Access Memory
|
- Description
-- Volatile -- Contents of memory erased when power is off -- Processor must have some RAM as working memory/buffer - Type of software stored -- Application software -- Operating system -- User files - Reason -- Allows for changes to be made to saved contents -- Allows for changes to be made to files in current use/user can enter data -- Fast access to data |
|
|
Hard Disk Drive (HDD)
|
- Used for storing operating systems, application and system software and data files
- Fast access to data - Large capacity - Requires formatting before use |
|
|
CD-ROM (Compact Disc-Read Only Memory)
|
- Uses reflection of a laser off a pitted surface to store information
- Stores significant quantities of information - Completely portable from one machine to another - Access to information is slow - CD_ROM cannot be altered/changed by the use - E.g. To load software such as encyclopaedias |
|
|
CD-RW (Compact Disc-ReWritable)
|
- Same as CD-ROM except...
- Contents can be both erased and rewritten - Used to make back up files - Useful for transporting files |
|
|
DVD-ROM and DVD-RW
|
- Same as CD-ROM and CD-RW except...
- Holds larger amounts of information - Faster access to information |
|
|
USB Flash Drive
|
- Usable on nearly any machine
- Very fast access to information - Device is fully portable, light and small - No moving parts, therefore more suitable for carrying around - Large capacity - Used to store sensitive information as the device can be kept with the owner - Can be used to transport files - Can be used to make back ups |
