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In designing a computer’s cache system,

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Explanation for each option

Option A – False .Because larger block size incurs better spatial locality.

Option B – False. Decreasing a block size or having small block leads to bigger tag size ( more tag bits) hence higher tag overhead.

Option C – False . Can’t relate larger cache tag with lower cache hit time.

Option D – True . As it take less time to load a small block into cache from main memory in case of miss , so smaller block size incurs a lower cache miss penalty .
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in case of cache miss following block is loaded into into cache this time is known  as miss penalty when block size is low that miss small block will be loaded into cache which will obviously take less time than loading larger block. hence option D is correct.

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