Exam (elaborations)
Solutions Manual for Understanding Operating Systems 8th Edition McHoes
- Course
- Business
- Institution
- Rio Salado Community College
Solutions Manual for Understanding Operating Systems 8th Edition McHoes
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SOLUTIONS MANUAL FORUNDERSTANDING OPERATING
SYSTEMS 8TH EDITION MCHOES
,Understanding Operating Systems 8th Edition McHoes Solutions Manual
Exercises, Chap 2
Research Topics (Answers here will vary. Look for originality in the student’s work.)
A. Research the maximum and minimum memory capacity of two models of laptop
computers. Be sure not to confuse the computer’s memory capacity with its secondary
storage. Explain why memory capacity and secondary storage are often confused. Cite
the sources of your research.
B. Identify an example of an online data source that’s used by researchers to advance their
profession. Consider interstellar databases, medical data sources, and so on. Explain
what kinds of data are included in the online source, the researchers who access it, and
scientific advances that may have stemmed from such a resource. Be sure to cite your
sources.
Exercises
1. Consider the first and last memory allocation scheme described in this chapter. Describe
their respective advantages and disadvantages. ANSWER:
Single User Contiguous Relocatable Dynamic Partitions
Advantages Requires minimal Allows multiple jobs in
overhead memory at one time
No external Better use of the CPU
fragmentation Improved use of memory
space
Chapter 2 Exercises Page 1
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, Exercises, Chap 2
Resolved external
fragmentation
Disadvantages Does not allow multiple Requires significant
jobs in memory at one overhead for memory
time compaction and job
Poor use of the CPU management
resources
2. In your own words, how often should memory compaction/relocation be performed?
Describe the advantages and disadvantages of performing it even more often than
recommended. (Answer)
We hope every student will have a unique answer to this question, which depends on the cost
of the overhead operation in terms of processing time and use of system resources required
for relocation (such as disk space). The question is designed to encourage students to
speculate on the cost to throughput and system resources of relocation and compaction.
Certainly, if those costs are not taken into consideration, some students might suggest that
relocation be performed very, very often.
3. Give an example of computing circumstances that would favor first-fit allocation over
best-fit. Explain your answer. (Answer: Students should conjure unique examples that
emphasize data writing speed over data retrieval speed. Such circumstance would include
data archival and massive storage of data that will seldom be retrieved. This question is
designed to explore current technologies as they relate to speedy storage of data
elements.)
Chapter 2 Exercises Page 2
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