What is the purpose of a translation look-aside buffer (TLB)?
Correct answer A. To cache recent page-number to frame-number translations so most lookups avoid an extra memory access
Explanation
Without help, paging doubles memory accesses: one to read the page-table entry and one for the data. The TLB is a small, fast associative cache of recent translations; on a hit the frame number is available almost immediately. Disk blocks are cached in the buffer or page cache, and printer output is handled by spooling.
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