1.2 Memory and Storage Flashcards
What does RAM stand for?
- Random Access Memory
What does ROM stand for?
- Read Only Memory
What does the term volatile mean?
- Data is loss if the device is off
What does the RAM hold?
- Operating system
- Programs in use
What does the ROM hold?
- Bootstrap
- BIOS ( basic input and output system )
What is Moore’s Law?
- Every two years the average storage of devices are doubled.
What is L1 storage?
- CPU
What is L2 storage?
- Cache
What is L3 storage?
- Main memory
- Primary memory
What is cache?
- Temporary memory
- Holds frequently used instructions
What is an advantage of cache?
- Fast processing speed
- Efficient
What is a disadvantage of cache?
- Expensive
What is the definition of virtual memory?
- Extension of RAM
- Hard disk
What is an advantage of virtual memory?
- Swap space ( auto execution )
- Saves money from buying new RAM
What is a disadvantage of virtual memory?
- Shortens disk life span
- Long execution
- Slow processing speed
What is data?
- Information stored on a device
- Used for processes to increase efficiency
What is primary memory?
- Initial processor
What is the equation for sound files?
- Bytes per sample x samples per second x channels x duration
What is the equation for picture files?
- Height x width x bit depth
+10% for …
- Overheads
What is secondary storage?
- A memory
- External of computers
What are the properties of secondary storage?
- Non volatile
- Later retrival
What is cloud storage?
- Internet accessed
- Data
- External
What are the advantages of cloud?
- Unlimited storage
- Provided
- Available over any device
- Automatic backup
What are the disadvantages of cloud?
- Cyber attacks
- Power outage
- Internet access required
What is magnetic storage?
- Mechanical
- Moves over disk to read or write
- Concentric circles
What is optical storage?
- Lasers
- Light
- Pits and lands
What is solid state storage?
- No moving parts
What are the advantages of magnetic storage?
- Cheap
- High capacity
- Fast speed
What are the disadvantages of magnetic storage?
- Low durability
- Low portability
- Moving parts
What are the advantages of optical storage?
- Cheap
- Portable
What are the disadvantages of optical storage?
- Low capacity
- Low durability
- Slow speed
What are the advantages of solid state storage?
- High durability
- Fast speed
What are the disadvantages of solid state storage?
- Expensive
What are the six characteristics of secondary storage?
- Cost
- Capacity
- Durability
- Reliability
- Portability
- Speed
Define speed ;
- Data transferred
Define cost ;
- £ per GB
Define capacity ;
- Storage medium holds
Define durability ;
- Strength of medium
- Robustness
Define portability ;
- Transportability
Define reliability ;
- Resilience of medium
Provide an example of magnetic storage ;
- Floppy disk
- Hard drive
- Tape drive
Provide an example of optical storage ;
- CDs
- DVDs
- Blu Ray
