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Cisy 304:Computer Operating System Ii Question Paper

Cisy 304:Computer Operating System Ii

Course:Computer Science

Institution: Kenya Methodist University question papers

Exam Year:2015

KENYA METHODIST UNIVERSITY

END OF 1''st ''TRIMESTER 2015 (PT) EXAMINATION
FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE
UNIT CODE : CISY 304/BBIT 419
UNIT TITLE : COMPUTER OPERATING SYSTEM II
TIME : 2 HOURS

INSTRUCTIONS:

Answer question One and any other two questions

Question One (30 Marks)

Give any five reasons why a parent process may terminate a child process.

(5 marks)

Differentiate between the following terms as used in operating systems

DMA and polling

(3 marks)

Shared and message passing systems

(3 marks)

Distinguish between a microkernel and a layered operating system structures.

(4 marks|)

Describe the function of the following commands as used in UNIX

CHMOD

(2 marks)

NICE

(2 marks)

TOP

(2 marks)

Describe the term "Zombie process" as used in operating systems and explain how UNIX manages Zombie processes

(5 marks)

Explain the concept of segmentation as used in Memory Management.

(4 marks)

Question Two (15 marks)

Compare the following as used in file systems

Direct and sequential file access

(2 marks)

Linked and contiguous allocation

(2 marks)

Consider the Read file C) function in the WIN32 API below

Bool ReadFileC (HANDLE File

LPVOID buffer,

DWORD bytes To Read,

LPDWORD bytes Read,

LPOVERLAPPED OVL);

Provide a brief description of the parameters passed to Read file function (5 marks)

Describe any three advantages of cooperating processes during interprocess communication

(6 marks)

Question Three (15 marks)

Describe input/output buffering as used in operating systems.

(6 marks)

Show how sockets can be used by process running on client machine in order to communicate with server process. Outline specific system calls used.

(9 marks)

Question Four (15 marks)

Outline the contents of a process control block with an aid of a diagram.

(3 marks)

Discuss the following dynamic memory placement algorithms.

First fit

(3 marks)

Next fit

(3 marks)

Describe any three memory management requirements

(6 marks)

Cisy 304:Computer Operating System Ii Question Paper

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