KNEC Craft Certificate in ICT module 1 Operating Systems past paper: November 2015 Answers

Answers for CICT OS November 2015

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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Explain each of the following terms as used in process management: (i) hold and wait; (ii) sleep and wake. ()

Explain each of the following terms as used in memory management: (i) spooling. (ii) overlay. ()

Define each of the following terms as used in operating system: (i) shell. (ii) system call ()

Explain two functions of semaphore as used in concurrency control ()

Distinguish between trap and scheduler resource stating an example for each as used in operating system. ()

With the aid of a diagram, describe the layered operating system ()

Distinguish between protector and supervisor modes of operation in operating system. ()

With the aid of an example, describe the term device driver as used in operating system ()

Explain two advantages of graphical user interface as used in operating system ()

10.

Explain two functions of a process control block in an operating system ()

11.

Process management is one of the functions of the operating system. Explain three activities that the operating system carries out during the process ()

12.

Zahra intends to procure an operating system for her own organization. Explain three factors other than cost that she should consider ()

13.

With the aid of a diagram, describe circular wait as used in operating system ()

14.

Outline three functions of system clock in operating system ()

15.

Table 1 shows three processes in a memory. Use it to answer the questions that follows. Table 1 (i)Suppose the arrival order of the process is Pk, PT and PZ then using the first come first served schedule algorithm, draw the Gantt chart to represent this information. (2marks) (ii) Calculate the average waiting time for the process. ()

16.

With the aid of a diagram in each case, describe each of the following memory management techniques: (i) paged;(4marks) (ii) partitioned ()

17.

Explain the term remote procedure call as used in process management ()

18.

Define each of the following as used in memory addressing: (i) logical address; (ii) physical address ()

19.

derrick an ICT specialist for koja co Ltd has advised the company to use the open source operating system platform. Explain three advantages of this platform ()

20.

Distinguish between pre-emptive and non-pre-emptive scheduling as used in operating system. ()

21.

Zippy, the head of the ICT department in an airline proposed to the company to purchase a real time operating system. Explain three reasons that could justify her proposal. ()

22.

When revising for an operating system exam, joy came across the terms dumb and intelligent terminal. Describe each of this terms in data transmission ()

23.

James chose to purchase an operating system with an NT file system. Explain one Advantage of this file system that he could have consider ()

24.

Liana had the following examples of software when revising for her computer exam. Classify them as either system or application software. (3marks) Windows, lotus, Quadruple, Linux, Ms office 2013 and Android. ()

25.

List three examples of utility programs in operating systems ()

26.

With the aid of an example, describe the term virtual device as used in operating systems ()

27.

With the aid of a diagram, describe linked file allocation methods as used in operating system ()

28.

Ken approved of the microkernel approach to operating system design. Explain three reason that could have led to his approval ()