COMPUTER ARCHITECTURE
MEMORY SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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write back
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LRU
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write through
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unified cache
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Detailed explanation-1: -The simplest policy is called write through. Using this technique, all write operations are made to main memory as well as to the cache, ensuring that main memory is always valid.
Detailed explanation-2: -Cache memory is a chip-based computer component that makes retrieving data from the computer’s memory more efficient. It acts as a temporary storage area that the computer’s processor can retrieve data from easily.
Detailed explanation-3: -The main memory location of the word is updated later, when the block containing this marked word is to be removed from the cache to make room for a new block. This technique is known as the write-back, or copy-back protocol.
Detailed explanation-4: -When virtual addresses are used, the cache can be placed between the processor and the MMU or between the MMU and main memory. A logical cache, also known as a virtual cache, stores data using virtual addresses. The processor accesses the cache directly, without going through the MMU.