What is the best difference between cache and buffer?

Correct answer: Cache gives frequent data fast and buffer handles temporary transfer

The direct answer is option A. Cache and buffer are both temporary memory areas, but they solve different problems. A cache keeps copies of data that is likely to be used again, so the processor or program can obtain frequently needed data faster. A buffer temporarily holds data while it moves between devices or processes that work at different speeds. For example, a printer buffer can hold a document while the printer prints it. Thus option A correctly states that cache speeds repeated access and buffer manages temporary transfer. Option B is wrong because a cache and a buffer are not a printer and a monitor; those are output hardware devices. Option C is nonsensical: neither term means a chair. Option D is also unrelated because neither term means a pen-drive colour. The difference is based on purpose, not on physical colour or a particular device. Cache focuses on faster reuse; buffer focuses on smooth movement and temporary waiting during transfer. Memory cue: cache means “use again quickly”; buffer means “hold while moving.”