KNEC Diploma in ICT module I Operating systems past paper: November 2014 Answers

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Course Name:  Information and Communication Technology
Also Done By:
CICT Module 1
Course Level:  Diploma
Sub Level:       Module I
Course Unit:   Operating Systems
Exam body:    KNEC
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Outline four resources in a process excecution ()

Different between interrupt and system call as used in operating systems ()

Explain the term context switch as used in operating ()

A lecture described objectives of process scheduling in operating system’s class. Explain two objectives that he could have mentioned ()

Bruce was required to identify the appropriate memory placement techniques for a proposed operating system. Explain Three techniques that he could have considered ()

Outline two types of directory structure in an operating system ()

Explain each of the following terms as used in operating system i)Access right ii)Flags ()

The figure 1 shows layers in computer memory hierarchy. Use it to answer the questions that follows.Describe each of the following layer labelled (i) and (ii). ()

Petro was investigating advantages of memory segmentation in operating system. Explain two advantages that he could have identified ()

10.

Outline two types of file that could be found in operating system ()

11.

Brian intends to back up a file, explain two backup strategies he could use ()

12.

Explain the following terms as used in operating system: (4 marks) (i)bootstrap ii)Firmware ()

13.

Figure 2 shows a typical process model used in operating system, use it to answer the questions that follows:Identify the parts labelled (i), (ii), (ii), iv and (v). ()

14.

Dorothy intends to design an operating system that uses swapping in memory management. Explain two constraints that are likely to be realized ()

15.

Outline three goals of input output module ()

16.

Distinguish between SCAN and C-SCAN disk scheduling algorithms ()

17.

Hope intends to develop a file management for an operating system. Explain two file access methods she should consider ()

18.

With an aid of a diagram in each case, describe each of the file system. (4 marks) (i) single-level directory; (ii) two-level directory ()

19.

Angie was required to investigate the factors that affect the performance of storage disk. Outline four factors that she could have considered ()

20.

Explain each of the following tables as used in memory management: (i) hashed ii) Clustered page ()

21.

Distinguish between long-term and short-term schedulers as used in process management. ()

22.

Loise required to run disk managements utilities during computer maintenance. Explain three examples of utilities she could use ()

23.

Figure 3 shows memory allocation techniques. Use it to answer the questions that follows Explain the memory management techniques depicted above ()

24.

Define the following terms. (i)seek time ii)transfer rate iii)rotational latency ()

25.

Stano listed several examples of I/O buses that could be used in disk drives. Outlines four examples that could have listed ()

26.

File attributes varies from one operating system to another. Outline five examples of these attributes ()

27.

With the aid of a diagram, outline one typical process control block (PCB) diagram as used in operating system ()

28.

Define the term live lock as used in memory management ()

29.

Distinguish between overlying and partitioning as used in memory management ()

30.

Mercy, an intern student was required to discuss example of file operations during job interview. Outline four example that she could have mentioned ()

31.

Sayd company Ltd intends to replace its single-processor operating system. Outline two limitations of the existing operating system that could have influenced the decision ()

32.

Claudius was required to list advantages of dynamic linking in memory management. Explain three advantages that he is likely to have listed ()

33.

Define the term programmable interval timer as used in operating systems ()

34.

Outline four services that could be provided by I/O subsystem kernel ()

35.

Explain four circumstances that would necessitate premature termination of a process execution an operating system ()

36.

With the aid of a diagram, describe the parts of a magnetic disks ()