1. What are the four most common physical types of memory and specify the type of memory access method each type of memory uses?

2. (a) What is the data transfer rate of a main memory running 16 MHz using a 32-bit data bus?

(b). Assume that a disk memory has on average 2 ms access time to read/wirte data, estimate the average time to read 128 KB of data at the transfer rate of 4Mbps

3. (a). What is data transfer unit between CPU and cache?

(b). What is data transfer unit between cache and RAM?