1.2 Memory and Storage
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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