Operations Management July 2014 Past Examination Question Paper – KNEC
This Past Paper examination was examined by the Kenya National Examination Council (KNEC) and it applies to the following Certificate course
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Diploma in Supply Chain Management – Module III
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Diploma in Project Management _ Module III
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Business Education Single and Group Certificate Examinations – Stage III
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THE KENYA NATIONAL EXAMINATIONS COUNCIL
DIPLOMA IN INFORMATION COMMUNICATION TECHNOLOGY
MODULE I
OPERATING SYSTEMS
July 2016
Time: 3 hours
1. (a) Explain the term interrupt as used in operating system. (2 marks)
(b) (i) Describe the term swapping us used in memory management. (2 marks)
(ii) Outline four types of computer registers. (4 marks)
(c) Explain three roles of process control block in operating systems. (6 marks)
(d) (i) Outline two objectives for designing an operating system. (2 marks)
(ii) Most processors support at least two modes of process execution. Explain two modes that are likely to be supported. (4 marks)
2. (a) Explain each of the following terms as used in operating system:
(i) time slice; (2 marks)
(ii) thread. (2 marks)
(b) James was required to design an operating system that would perform a number of essentially independent tasks that do not need to be serialized.
(i) Identify the most appropriate processing technique that he could use justifying your answer. (2 marks)
(ii) Outline four advantages of the processing techniques identified in (i). (4 marks)
(i) Explain the term process spawning as used in operating systems. (2 marks)
(ii) Differentiate between cluster and sector as applied to physical storage disks.
(4 marks)
(d) Joy intends to buy ar. I/O device for her computer. Outline four factors that she should consider, other than the cost. (4 marks)
3. (a) (i) Outline three disadvantages of system buffering in I/O communications. (3 marks)
(ii) Mitchell was required to investigate characteristics of a First-In, First-Out (FIFO) disk scheduling algorithm system. Describe two typical characteristics that she could have established. (4 marks)
b) A lecturer explained the desirable qualities of file organization to a class. Outline five qualities that he could be possibly facing. (5 marks)
c) Reader Company Ltd. is experiencing data security threats. Outline four threats that the company could be facing. (4 marks)
(d) Pato installed a micro kernel operating system in his computer. Explain two benefit that he could realize while using it. (4 marks)
4. (a) Outline three typical address information in a file directory. (3 marks)
(b) (i) Define the term key field as used in file management. (2 marks)
(ii) Typically, users are granted certain access rights to a file. Outline five examples of access rights that can be assigned to a user. (5 marks)
(c) (i) Outline two problems that could be experienced with fixed memory partitioning. (2 marks)
ii) Differentiate between block-oriented and Stream-oriented services. (4 marks)
d) Memory paging is a popular technology in operating systems. Explain two advantages of the technology that could be influencing the trend. (4 marks)
5. a) Outline four desirable features of a file system. (4 marks)
b) Differentiate between memory address register (MAR), and memory buffer register (Wfi), as applied in operating systems. (4 marks)
c) i) Outline four reasons that would render a process into suspension state. (4 marks)
ii) Figure 1 shows virtual memory addressing scheme in an operating system.
Explain the two memory addresses labelled I. and II. (4 marks)
d) Oliver was required to prepare a presentation on I/O facilities in operating system.
Describe two I/O facilities that she could have highlighted in her presentation.
(4 marks)
6. a) i) Outline two requirements for virtual memory in computers. (2 marks)
ii) Differentiate between a parent process and a child process. (4 marks)
b) i) Define the term thrashing as used in memory management. (2 marks)
ii) Explain two types of virtual memory replacement policy/strategy. (4 marks)
Figure 1 shows a typical file allocation method. Use it to answer the question that follows
(i) Describe the file allocation method depicted in the diagram. (2 marks)
(ii) Outline two advantages of the file allocation method described in (i). (2 marks)
(iii) Explain two strategies that could be adapted to conserve disk space when using file allocation method described in (i). (4 marks)
7. a) For each of the following tasks identify appropriate file operation that could be used:
(i) Replacing filename; (1 mark)
(ii) Display file content; (1 mark)
(iii) Formatting a disk that contains files; (1 mark)
(iv) Stores a new file in disk. (1 mark)
b) Lucky was investigating factors influences deadlocks in operating systems. Outline four factors that he could have established. (4 marks)
(c) Programmers encounter several challenges when using memory overlay in operating systems. Explain two challenges that they are likely to experience. (4 marks)
(d) (i) Nancy intends to develop an operating system that would supports several types of RAID configurations. Explain two types of RAID configurations she should consider. (4 marks)
(ii) The CPU uses several types of interrupt to handle I/O communications in a computer. Outline four types of interrupts that could be used in a computer. (4 marks)
8.(a) (i) Explain the term frame as applied in memory management. (2 marks)
(ii) Differentiate between fetch and cleaning policies as applied in virtual memory.
(4 marks)
b) Clifford was required to design a general-purpose time-sharing system for his client.
(i) Describe the most appropriate process scheduling technique that he could use. (2 marks)
(ii) Outline two disadvantages of process scheduling technique described in (i). (2 marks)
(iii) Explain one factor that affects performance in the process scheduling technique described in (i). (2 marks)
(c) Memory segmentation allows programmers to create memory references in their design. Outline four advantages programmers could realize using memory references. (4 marks)
(d) Distributed operating systems are widely used in many organizations. Explain two features that could be influencing the trend. (4 marks)
