MGT Fall 2005 Exam #1

Transcription

1 MGT Fall 2005 Exam #1 Short Answer (5 points each): 1. What is the data transfer rate of a disk drive with a 10 ms. average access time and 512 byte sector size? 2. Why isn t SRAM commonly used to implement primary storage? 3. List the three electromechanical factors that determine access time of a disk storage device. Which is the most significant? MGT 337 (Fall 2005) Exam #1 Page 1 of 8

2 4. Why will a CPU with four general-purpose registers usually execute a program more quickly than the same CPU with only two general-purpose registers? 5. Which format, 32-bit twos complement or 32-bit IEEE floating point, should a programmer choose to represent monetary values? Why? 6. What is/are the difference(s) between ASCII and Unicode? MGT 337 (Fall 2005) Exam #1 Page 2 of 8

3 Medium Length Answer(10 points each): 7. Of the primitive instructions - MOV, NOT, AND, OR, XOR, ADD, SHIFT, BRANCH, HALT - which (or what set) can be used to subtract one twos complement value from another? Which can be used to multiply one twos complement value by another? Which can be used to divide one twos complement value by another? 8. List five computer classes. In what way(s) are the boundaries among computer system classes "blurred" or "soft"? MGT 337 (Fall 2005) Exam #1 Page 3 of 8

4 9. What is Moore s Law? What is Rock s Law? What does the combination of both laws imply about the difference in the output quantity of a microprocessor fabrication facility constructed in 2006 compared to another fabrication facility constructed in 2010? 10. In what way(s) does system software make application software more portable? In what way(s) does system software make application software cheaper and faster to build? MGT 337 (Fall 2005) Exam #1 Page 4 of 8

5 11. What is a cluster? What is a grid? Which is more likely to be used by an organization that executes many numerical simulation programs on a daily basis? Which is more likely to be used by an organization that uses computers primarily for ordinary business functions but executes a large marketing research application once per week? 12. What is/are the difference(s) between L1, L2, and L3 primary storage caches? Where is each cache type most likely to be implemented in a modern computer system? MGT 337 (Fall 2005) Exam #1 Page 5 of 8

6 13. A high-performance Brand X microprocessor is available in single-core and quad-core version. The single-core microprocessor has a 64 Kbyte L1 cache and a 2 MByte L2 cache. The quad-core microprocessor has four 64 Kbyte L1 caches (one per core) an 8 Mbyte L2 cache which is shared by the cores. The quad-core microprocessor has four time the data transfer capacity to primary storage as the single-core microprocessor. The processing cores are identical in all other respects including clock rate, word size, instruction set, and data transfer capacity to/from primary and secondary storage. Mark is shopping for a midrange computer to run multiple services including file sharing, printer sharing, , web sites, and Internet security. Wendy is shopping for a workstation to run experimental weather prediction programs that currently take many hours to complete on her personal computer. Both are considering computers systems from the same vendor that use the same two motherboards: XSC04 - contains four Brand X single-core microprocessors, 16 GBytes RAM, and supports 1 GByte/second maximum data transfer rate between each microprocessor and RAM XQC04 - contains one Brand X Quad-core microprocessor, 16 GBytes RAM, and supports 4 GBytes/second data transfer rate between the microprocessor and RAM The motherboards are very similar except for the differences noted above. The midrange computer systems that Mark is considering cost $20,000 (XSC04 motherboard) and $24,000 (XQC04 motherboard). The workstations that Wendy is considering cost $6000 (XSC04 motherboard) and $10,000 (XQC04 motherboard). Questions are on next page Hint: Despite appearances, this question is not a repeat of homework #1, though there is some overlap. MGT 337 (Fall 2005) Exam #1 Page 6 of 8

7 Questions: Is the more expensive midrange computer worth the extra money for Mark? Why or why not? Is the more expensive workstation worth the extra money for Wendy? Why or why not? MGT 337 (Fall 2005) Exam #1 Page 7 of 8

8 Scratch Sheet MGT 337 (Fall 2005) Exam #1 Page 8 of 8