Describe in detail the purpose of control lines in memory?

Explain in detail the difference in memory address and data lines. 

Compare and contrast main memory and long term storage. 

Compare and contrast Direct Memory Access (DMA) to program and interrupt driven I/O. 

Assume a computer has the capacity to hold up to 6 memory modules, with each module containing 1G bytes.  How many bits are needed to address any byte in a module?  How many total bits are needed in the memory address? 

Explain in detail the primary components that comprise a Central Processing Unit. 

A signal has a frequency of 100 megahertz, what is its period? 

Suppose you have a HDD with an average seek time of 10 msec and a rotational speed of 5400 RPM.  How long would it take to transfer 1M byte.  Assume 500 sectors on a track, and each sector contains 512 bytes. 

Suppose you have a HDD that with an average seek time of 8 msec and a rotational speed of 7200 RPM.  How long would it take to transfer 1M byte.  Assume 500 sectors on a track, and each sector contains 512 bytes. 

3.   Which microbiology pioneer correlated the infection rate with the frequency of hand washing?