1. Select one or more of the following statements about data compression that are true.

A. Compression ratios for lossy compression algorithms are usually higher than for lossless compression algorithms.

B. MP3 is a lossless compression method.

C. Enabling compression of messages sent across a network reduces the load on CPUs in the sending and receiving computer

D. If the CPU(s) in a laptop computer is/are frequently 100% busy, enabling disk compression will hurt overall system performance

2. Select one or more of the following statements that correctly describe the performance implications of doubling the size of a buffer in an output device or device controller.

A. The performance improvement may be much less than 2x due to diminishing rates of return on increased buffer size.

B. All data transfers through the larger buffer will occur in half the time of data transfers through the smaller buffer.

C. If the previous buffer size was relatively large, the performance improvement resulting from doubling its size may be offset by the cost of the additional buffer capacity.

D. Double the number of interrupts will traverse the system bus for all data transfers through the larger buffer.

3. When three primary storage cache levels are in use, the cache farthest from the CPU registers is called ____________.

A.		L1
B.		L2
C.		L3