What is the correct difference between cache and buffer?

Correct answer: Cache gives frequent data fast and buffer manages data transfer

The direct answer is option A. Cache and buffer are related but not identical. A cache stores copies of data that may be requested repeatedly, allowing faster access the next time it is needed. A buffer temporarily stores data during transfer between a producer and a receiver, especially when the two operate at different speeds. For example, incoming audio may wait in a buffer while a device processes it. Therefore option A correctly says that cache gives frequently used data quickly and buffer handles data transfer. Option B is wrong because a monitor is output hardware and a keyboard is input hardware; neither word is the definition of cache or buffer. Option C is unrelated: cache and buffer are not printer paper. Option D is false because neither one is always a virus; viruses are malicious programs, while cache and buffer are normal computing mechanisms. Cache is mainly about faster repeated access, whereas buffer is mainly about managing flow and waiting during transfer. Memory cue: cache helps reuse; buffer helps transfer.