Cache memory works on the principle of __________.
Locality of reference
The correct answer is Locality of reference.
Cache memory is a small, fast memory that stores frequently accessed data. It works on the principle of locality of reference, which states that recently accessed data and instructions are likely to be accessed again in the near future. This principle stems from two main concepts:
- Temporal Locality: If a data item is referenced, it is likely to be referenced again in the near future.
- Spatial Locality: If a data item is referenced, data items nearby are also likely to be referenced soon.
By exploiting these localities, the cache can significantly improve the performance of a computer system by reducing the average access time to data. When the CPU needs data, it first checks the cache. If the data is found (a "cache hit"), it's retrieved much faster than from the main memory. If the data is not in the cache (a "cache miss"), it's fetched from the main memory and a copy is placed in the cache for future use. The other options are incorrect because they do not accurately describe the fundamental principle upon which cache memory operates.
Important Questions from Memory
One Exabyte is equal to ______.
Which of the following memory is volatile?
- 1 GB consists of:
Which of the following needs to be refreshed to retain data even when power is on (electric current flows)?
Which of the following is NOT an external memory?
