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Ins 202: Operating Systems Theory Question Paper
Ins 202: Operating Systems Theory
Course:Bachelor Of Science In Information Science
Institution: Moi University question papers
Exam Year:2014
MOI UNIVERSITY
OFFICE OF THE CHIEF ACADEMIC OFFICER
UNIVERSITY EXAMINATIONS
2013/2014 ACADEMIC YEAR
SECOND YEAR FIRST SEMESTER EXAMINATION
FOR THE DEGREE OF
BACHELOR OF SCIENCE
IN
INFORMATION SCIENCES
COURSE CODE: INS 202
COURSE TITLE: OPERATING SYSTEMS THEORY
DATE: 21ST FEBRUARY, 2014 TIME: 9.00 A.M. – 11.15 A.M.
INSTRUCTION TO CANDIDATES
• SEE INSIDE
THIS PAPER CONSISTS OF (5) PRINTED PAGES PLEASE TURN OVER
MOI UNIVERSITY
SCHOOL OF INFORMATION SCIENCES
DEPARTMENT OF INFORMATION TECHNOLOGY
FIRST SEMESTER 2013/2014 ACADEMIC YEAR EXAMINATIONS
COURSE CODE: INS 202 TIME: 2 Hrs 15 Mins
COURSE TITLE: OPERATING SYSTEMS THEORY ==============================================================================
INSTRUCTIONS TO CANDIDATES:
• Answer question ONE and any other TWO questions
QUESTION ONE (30 MARKS)
a) Explain the term Operating System (2 marks)
b) Explain the TWO main objectives of an operating system (2 marks)
c) Describe any FOUR attributes of a file (8 marks)
d) Explain any FOUR security provisions that should be implemented in an operating system (8 marks)
e) Distinguish the following terms as used in operating systems (10 marks)
i) Process and Program
ii) Device Drivers and Device Controllers
iii) Multiprogramming and Multiprocessing
iv) Internal Fragmentation and External Fragmentation
v) First-come-first-served and Shortest Job First scheduling algorithms
QUESTION TWO (20 MARKS)
a) Distinguish between Logical Address and Physical Address as applied in operating systems (4 marks)
b) Explain any FOUR basic functions of an operating system (8 marks)
c) Use the Five-state Process Model to describe process transition (8 marks)
QUESTION THREE (20 MARKS)
a) Using suitable examples, distinguish between Paging and Segmentation (4 marks)
b) Describe any FOUR components of a Process Control Block (8 marks)
c) Given the following static partitioning situation: 100K, 500K, 200K, 300K and 600K (in-order), show how the operating system allocates the processes of size 212K, 417K, 112K and 426K (in-order) according to First Fit and Best Fit (8 marks)
QUESTION FOUR (20 MARKS)
a) Distinguish between Deadlock and Starvation as used in operating system (4 marks)
b) Explain the FOUR necessary conditions for the occurrence of deadlocks (8 marks)
c) Describe the concept of Memory Hierarchy and compare the different types of memories in terms of storage capacity, cost and access speed (8 marks)
QUESTION FIVE (20 MARKS)
a) Compare and contrast MS-Windows 7 and Linux Operating systems (4 marks)
b) Using suitable illustrations, describe the term Context Switching as applied in operating systems (4 marks)
c) Describe the key features of each of the following types of Operating Systems citing an appropriate application environment for each: (12 marks)
i) Real Time Operating System
ii) Distributed Operating System
iii) Network Operating System
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