1. Which of the following items are definitions of WRITE BACK ? a. All write operations are made to main memory as well as to the cache b. Updates are made only in the cache c. This makes for complex circuitry and a potential bottleneck d. Portions of main memory are invalid and hence accesses by 1/O modules can be allowed only through the cache e. Minimizes memory writes f. The main disadvantage of this technique is that it generates substantial memory traffic and may create a bottleneck 6 - DO b,d,e.f a,b,c,e,f b,c,d,e )O a, c, d, f

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A:

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