Essentials of MIS (12th Edition)
12th Edition
ISBN: 9780134238241
Author: Kenneth C. Laudon, Jane P. Laudon
Publisher: PEARSON
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Chapter 8.4, Problem 2CQ2
Program Plan Intro
System vulnerability:
- When huge data amounts are been kept in electronic form, it becomes susceptible to many threats.
- The
information systems in many locations are been interconnected through communication networks. - The unauthorized access can occur at many access points in network and is not limited to single location.
- The data flowing over networks could be accessed; valuable information could be stolen while transmission or data could be altered without authorization.
- The denial-of-service attacks are launched by intruders to disrupt website operations.
- Internets are vulnerable than internal networks as it is open to everyone.
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Question D.4: FIFO Page Replacement
Consider the following page reference string:
e, c, b, e, a, g, d, c, e, g, d, a
Considering 4 frames, fill in the following table and then answer how many page faults would occur with the
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RS: reference string; FO: frame 0, F1: frame 1, etc.
Hint: all frames are initially empty, so your first unique pages will all cost one fault each.
Time
1234567891011
12
RS
e
cb
e agd ce g d
a
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F1
F2
F3
Page fault?
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memory has 2¹8 bytes. A process table is maintained with a pointer to the resident partition for each resident
process. How many bits are required for the pointer in the process table? Show all your steps.
Use the same semaphore notation shown above to describe how we can ensure the execution order of the
following process execution graph:
P6
P2
P7
P1
P3
P4
P5
Use all of the following semaphores in your answer:
s1=0; s2=0; s3=0; s4=0; s5=0; s6=0;
Chapter 8 Solutions
Essentials of MIS (12th Edition)
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