INTRODUCTION TO COMPUTERS
COMPUTER ARCHITECTURE AND ORGANIZATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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copy-back
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write-through
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copy-both
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write-back
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Detailed explanation-1: -The simplest answer is to write to both the cache and main memory at the same time. This is called a write-through policy. The main memory then always contains the same data as the cache.
Detailed explanation-2: -The cache augments, and is an extension of, a computer’s main memory. Both main memory and cache are internal random-access memories (RAMs) that use semiconductor-based transistor circuits. Cache holds a copy of only the most frequently used information or program codes stored in the main memory.
Detailed explanation-3: -It stores program instructions and data that are used repeatedly in the operation of programs or information that the CPU is likely to need next. The computer processor can access this information more quickly from the cache than from the main memory.