Questions and Answers
How does a CD-ROM store and read data?
Using laser
What is the capacity of a floppy disk?
1.4MB
What is the capacity range of a DVD?
4.7-17GB
What is the main purpose of a floppy disk?
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How does the speed of a CD-ROM compare to a hard disk?
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Which type of memory is a high-speed memory that a processor can access more rapidly than main memory?
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What type of memory is volatile and loses its contents when the current is turned off?
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What has become the principal bottleneck to system performance due to its inability to keep pace with microprocessor speed?
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What type of storage devices are RAM chips?
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Which type of memory holds less data but allows the CPU to access desired data and instructions more quickly?
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Study Notes
Data Storage Devices
- CD-ROM stores data as a series of tiny pits and lands on a reflective surface, read using a laser.
- Floppy disk has a capacity of around 1.44 MB.
DVD Capacity
- DVDs have a capacity range of 4.7 GB (single-layer) to 17 GB (dual-layer).
Purpose of Floppy Disk
- The main purpose of a floppy disk is to provide a portable storage medium for transferring files between computers.
CD-ROM Speed
- CD-ROMs have a slower data access speed compared to hard disks.
Memory Types
- Cache memory is a high-speed memory that a processor can access more rapidly than main memory.
- Volatile memory, such as RAM, loses its contents when the power is turned off.
System Performance Bottleneck
- Main memory has become the principal bottleneck to system performance due to its inability to keep pace with microprocessor speed.
RAM Storage
- RAM chips are a type of volatile storage device.
Cache Memory
- Cache memory holds less data but allows the CPU to access desired data and instructions more quickly.
