Operating System Question Paper

Operating System

Course:Diploma In Information Technology

Institution: Bungoma Technical Training Institute question papers

Exam Year:2012

STAGE I/III EXAMINATION FOR THE DIPLOMA IN INFORMATION
TECHNOLOGY
OPERATING SYSTEM
DATE: MARCH, 2012 TIME: 1½ HOURS
INSTRUCTIONS: Answer Any Three Questions
QUESTION ONE
a) Define the following terms used in OS; (5 Marks)
i. Computer
ii. System
iii. Data
iv. Information
v. Software
b) Define the term Operating System. (2 Marks)
c) Give FOUR solutions to the critical section problem in relation to mutual exclusion. (4 Marks)
d) Define semaphores giving a brief description on its actions. (2 Marks)
e) Using expressions and codes, explain how semaphores can be used to solve bounded buffer
problem. (7 Marks)
QUESTION TWO
a) Briefly explain the concept of a deadlock in operating systems. (4 Marks)
b) Explain FOUR necessary and sufficient conditions for a deadlock to occur. (8 Marks)
c) Explain FOUR ways of dealing with deadlocks. (8 Marks)
2
QUESTION THREE
a) State the history of OS explaining each of the FOUR generations. (4 Marks)
b) Describe the scheduling process explaining THREE types of schedulers. (7 Marks)
c) Explain the following scheduling algorithms; (9 Marks)
i. First Come First Served (FCFS)
ii. Shortest Job First (SJF)
iii. Round Robin
QUESTION FOUR
a) State EIGHT functions of OS. (4 Marks)
b) Explain the concept of memory management. (2 Marks)
c) Give one advantage and one disadvantage of dynamic partitioning as used in memory management.
(2 Marks)
d) Using diagram, explain the concept of paging, segmentation and virtual memory in relation to OS.
(12 Marks)
QUESTION FIVE
a)Explain FIVE possible states that a process can be in. (5 Marks)
b) Explain THREE main categories of Input/Output devices. (3 Marks)
c)Using a well labeled diagram, describe the Input/Output hardware architecture. (5 Marks)
d) With help of a diagram, explain the concept of DMA. (3 Marks)
e)Describe file management and differentiate between file locking and fragmentation. (4 Marks)

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