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Computer Operating Systems (Cisy 300) (Bbit 213) 3Rd Trimester 2014 Question Paper

Computer Operating Systems (Cisy 300) (Bbit 213) 3Rd Trimester 2014

Course:Bachelor Of Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2014

COMPUTER OPERATING SYSTEMS (CISY 300) (BBIT 213) 3RD TRIMESTER 2014
KENYA METHODIST UNIVERSITY

END OF 3'rd 'TRIMESTER 2014 (FT) EXAMINATION

FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE AND BUSINESS
INFORMATION
UNIT CODE : CISY 300/BBIT 213
UNIT TITLE : COMPUTER OPERATING SYSTEMS
TIME : 2 HOURS

INSTRUCTIONS

Answer question one and any other two questions

Question one (30 marks)

Briefly describe the following terms as used with computer operating systems;
(10 marks)
Multiprogramming
Context switch
Virtual memory
Thread
System program
Using an appropriate diagram, illustrate the positioning of operating systems with respect to the computer hardware and software components.
(6 Marks)
Memory management is a key component of any modern operating systems. Outline four functions performed by the operating systems with respect to memory management.
(4 marks)
With the help of a diagram describe the process states and the transitions between them.
(10 Marks)

Question Two (20 marks)

Define scheduling as used with operating systems and distinguish between job scheduling and CPU scheduling.
(4 marks)
Briefly describe the "multiprogramming with fixed partitions" memory management scheme and how it differs from the variable partition implementation schemes. Use a diagram/example to illustrate.
(10 marks)
State and briefly describe any three page replacement algorithms. (6 marks)

Question Three (20 marks)

Define a deadlock and briefly describe why deadlock management is a key concept in any modern operating systems.
(4 marks)
State and briefly describe the four conditions for a deadlock to occur.
(8 marks)
Briefly describe the following operating systems concept;
(8 Marks)
Batch system
Spooling
Parallel processing
Resource preemption

Question Four (20 marks)

Briefly describe any five components of the I/0 subsystems.
(10 marks)
State and briefly describe the two types of files.
(4 Marks)
Briefly describe any three operating systems structures in a manner as to distinguish them.
(6 marks)

Computer Operating Systems (Cisy 300) (Bbit 213) 3Rd Trimester 2014 Question Paper

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