Which of the following has the fastest speed in the computer memory hierarchy? ans. Disk cache Main memory Register in CPU Cache
Question
Which of the following has the fastest speed in the computer memory hierarchy?
- Disk cache
- Main memory
- Register in CPU
- Cache
Solution
The fastest speed in the computer memory hierarchy is typically found in the "Register in CPU". This is because the CPU register is located inside the processor itself, allowing for the quickest possible access to data. Here's a step-by-step breakdown:
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Register in CPU: The CPU register is the topmost component in the memory hierarchy and has the fastest speed. It holds the data that the CPU is currently processing.
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Cache: The cache is the next fastest component. It is a smaller, faster memory which stores copies of the data from the most frequently used main memory locations.
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Main memory: Also known as RAM, the main memory is slower than the cache and CPU register. It stores the data and instructions that the computer is currently using.
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Disk cache: The disk cache is a part of the hard disk and is slower than the main memory. It holds the data that is frequently read from the hard disk.
So, the correct answer is "Register in CPU".
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