KNEC Craft Certificate in ICT module I Operating Systems past paper: July 2014. Answers

This paper was answered by our KNEC examiners and Tutors and has been thoroughly revised to ensure right answers have been provided

Course Name:  Information and Communication Technology
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Course Level:  Craft Certificate
Sub Level:       Module I
Course Unit:   Operating Systems
Exam body:    KNEC
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1.

Define each of the following terms as used in operating systems i) DMA ii) Shell ()

2.

Ken intends to procure an operating system for his personal computer. Explain two factors that he should consider ()

3.

Distinguish between preemptive and non-preemptive scheduling algorithms as used in process management ()

4.

Explain each of the following memory placement policies i) best fit ii) First fit ()

5.

Describe each of the following terms as used in operating systems. i)Spooling; ii) Semaphore ()

6.

Zipper intends to procure a computer and she has approached you for advice on the benefits of the virtual memory to his computer. Explain to her two benefits of this memory. ()

7.

Describe each of the following file organization methods as used in operating systems: i)Sequential ii)Serial ()

8.

Outline two functions of the dispatcher as used in process management ()

9.

Distinguish between monolithic and layered systems as used in operating system ()

10.

Explain each of the following terms as used in process management i)Mutual exclusion; ii) Circular Wait ()

11.

Define the term firmware as used in operating systems ()

12.

Describe the term device independence as used in operating systems ()

13.

Josh came across the following MS-DOS commands when revising for an operating systems exam. Explain the function of each of these commands i)rd ii)md ii)dir ()

14.

Josh came across the following MS-DOS commands when revising for an operating systems exam. Explain the function of each of these commands i)rd ii)md ii)dir ()

15.

Describe each of the following terms as used in operating systems: (4marks) i)critical section ii)Starvation ()

16.

Arrange the following memory capacities in descending order; 200000 bytes, 1.2PB, 10TB, 205GB, 3125MB, 220500KB. ()

17.

With the aid of diagrams, describe two types of fixed partition allocation used in memory management ()

18.

Lara came across the following file extensions when working on her computer. Identify the applications that would have been used to create each file: i).mdbx ii).png iii).wav ()

19.

Outline three types of ROM as used in memory management ()

20.

Explain the term cache as used in memory management ()

21.

Mercy prefers the command interface to the graphical user interface. Explain three reasons for her preference ()

22.

With the aid of a diagram describe the RAID system as used in device management. ()

23.

Outline three reasons that could cause a process to terminate ()

24.

Shasha prefers to back up her data using compact disks. Explain three reasons for her preference. ()

25.

Sera Company Ltd intends to put controls to their organization to prevent unauthorized access to the system. Explain three logical security measures that could be used to achieve this objective ()

26.

Outline the functions of each of the following as used in disk management: i)actuator. ii)read/write head. ()

27.

Peter would like to design an operating system. Explain three qualities of a process scheduling algorithm that he should consider. ()

28.

With the aid of a diagram, describe the process control block as used in process management ()

29.

Explain the circumstance under which the First Come First Served process schedule algorithm could be applied ()