KNEC Craft Certificate in ICT module 1 Operating Systems past paper: July 2019 Answers

Answers for Operating System Past Paper July 2019

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. Richard intends to install an operating system in his new computer. Explain two requirements that should be considered before installation ()
2. Describe each of the following disk arm scheduling algorithm as used in operating system. (i) Elevator; (ii) Shortest seek time first. ()
3. Explain two advantages of flash memory over compact disks storage media. ()
4. Netcom company ltd, a mobile communication device manufacturer intends to install the android mobile operating system in their new device, explain two advantages the company would gain from using this operating system ()
5. Define each of the following terms as used in operating system: (i) Multiprogramming; (ii) Multitasking. ()
6. With the aid of a diagram, describe spooling technique as applied in operating system ()
7. Define each of the following terms as used in operating system. i)Polling ii)Pipe ()
8. Explain the two functions of directories in a computer system ()
9. Computer users are advised to set strong password to protect data. Outline four characteristics these passwords should possess ()
10. Differentiate between dynamic loading and dynamic linking as used in memory management ()
11. Outline three reasons for implementing threads at the user level ()
12. Outline three differences between a process and a thread as used in operating systems ()
13. The process control block of an operating system comprises of different types of information. Explain three types of this information ()
14. State three categories of system calls, giving an example in each case ()
15. Explain the three components of disk access time in an operating system ()
16. Table 1 shows different processes with their arrival and execution time. Use it to answer the questions that follow. (i) Draw a Grant chart to represent the scenario for using the round robin (RR) scheduling algorithm. (ii) Using the first come first served (FCFS) scheduling algorithm. Calculate the average waiting time for this scenario. (3 marks) (16:23)
17. Outline three advantages of an operating system that supports batch processing ()
18. The computer system is made up of different buses that facilitate input/output processes. Explain three of these buses ()
19. Operating system deadlocks are due to various causes. Outline three of these causes, stating a mechanism to prevent each ()
20. Define the term virtual machine as applied in device management ()
21. Describe paged memory management technique as used in operating system ()
22. Spedy communication company has embraced the use speech recognition technology. Explain three ways in which the company could apply the technology ()
23. During an operating system lesson, teacher discussed various types of operating system structure. Describe two of these structures ()
24. Outline the characteristic of an electronic file set with each other of the following attributes. (i) Hidden; (ii) Read only. ()
25. Describe each of the following file allocation techniques: (i) linked; (ii) indexed. ()
26. Disk operating system commands are divided into two major categories. Explain each of these categories, giving examples in each case ()
27. Distinguish between best fit and first fit storage placement policies as used in operating systems ()
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