Discussion
What is the purpose of the TLB (Translation Lookaside Buffer) in virtual memory systems ?
Answer: B
The TLB's purpose is to cache page table entries.
Translating a virtual address needs the page table, which lives in main memory. Reading it on every access would double the memory traffic. The TLB is a small, fast associative cache that holds recently used page-to-frame translations, so most translations take one quick lookup instead of a page table walk.
It does not store program data, which is the job of the data cache. It does not buffer I/O, and interrupt vectors are held in the interrupt vector table, not the TLB.
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