Correct Answer - Option 2 : Cache
Cache memory is a smaller and fastest memory component in the computer.
- Cache memory is a chip-based computer component that makes retrieving data from the computer's memory more efficient whereas RAM is a computer's short-term memory that helps to access the data stored in it instantly.
- Cache memory acts as a temporary storage area that is more readily available to the processor than the computer's main memory source i.e. RAM or ROM.
- Cache memory is sometimes called CPU (Central Processing Unit) memory because it is typically integrated into the CPU chip or placed on a separate chip that has a separate bus interconnect with the CPU.
- Thus cache memory is more accessible to the processor and able to increase efficiency because it is physically closer to the processor than RAM.
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Cache memory is closer to the processor than RAM so cache memory has to be smaller than the main memory.
- Consequently, cache memory will require less storage but it is more expensive than RAM.
Difference between SRAM and DRAM:
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Static RAM
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Dynamic RAM
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Data is stored in FF
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Data is stored in a MOS capacitor
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BJT, MOSFET is used
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MOSFET is used
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Faster
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Slower
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Power dissipation is more
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Low power dissipation
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Density is less
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Density is more
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Used as cache memory
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Used as main memory
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No refreshing is required
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Refreshing is required
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