KNEC Craft Certificate in ICT module 1 Operating Systems past paper: November 2021 Answers

This paper is also applicable to those doing Diploma in ICT Module 1

Course Name:  Information and Communication Technology
Also Done By:
Diploma in ICT Module 1
Course Level:  Craft Certificate
Sub Level:       Module I
Course Unit:   Operating Systems
Exam body:    KNEC
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1.

Outline four disadvantages of pre-emptive scheduling algorithm. ()

2.

Explain each of the following conditions of a deadlock: i)Mutual exclusion; ii)Circular wait ()

3.

Differentiate between process and thread as used in operating systems ()

4.

The computer systems uses programmable clocks in its operations. Describe the two types of such clocks. ()

5.

With the aid of a diagram, describe the Redundant Arrays of Inexpensive Disk (RAID) level 1. ()

6.

Define the term RAM as used in operating systems. ()

7.

Explain a circumstance where first in first out disk arm scheduling algorithm could be the most applicable ()

8.

Explain each of the following functions of an operating system: i)Memory management; ii)Device I/O Management. ()

9.

Distinguish between fixed and dynamic memory partitioning ()

10.

Outline four reasons for carrying out an audit trail as file security measure ()

11.

An operating system uses system calls concept when working on processes in a computer. Explain two function of this concept. ()

12.

Outline three functions of a long-term scheduler as used in process management ()

13.

A user intends to create a file in a computer system. Describe three attributes that could be applied. ()

14.

Anita would like to buy an operating system for a new computer. Explain three factors she could consider when choosing the software. ()

15.

Define the term memory scrapping ()

16.

Computers in a busy organization use overlays in virtual memory to manage the processes. Outline three effects of overlays in this memory ()

17.

A computer system uses a buffer virtual device to store addressable instructions. Explain three advantages of this device ()

18.

Describe two types of disk arm scheduling algorithms other than first come first served. ()

19.

The operating system maintains a process control block (PCB) for every process. Outline five examples of information stored in the PCB. ()

20.

A company uses a time-sharing operating system to manage its computer resources. Explain three advantages of this operating system. ()

21.

Outline three advantages of paging in virtual memory ()

22.

With the aid of a diagram, outline the layers of I/O software ()

23.

Outline three benefits of priority scheduling algorithm ()

24.

Describe each of the following operating system structures: i)Monolithic systems ii)Client server model. ()

25.

Differentiate between best-fit and first-fit partition allocation techniques ()

26.

Explain two circumstances that could lead to cache memory preference ()