Question $1(30$ Marks$)$

A$.$ A farmer has just purchased a big portion of land for commercial purposes. He plans to fully automate all the farming processes as this will ensure he has a maximum yield of his production. This automation requires him to have adequate systems in place. These systems will be running a lot of processes that are core to his business. The main identifiable processes include capturing of regular weather data $($temperature$,$ amount of rain fall, wind$),$ precise location data, images $($these images will be large and sometimes very large$),$ workers register$($attendance$),$ monthly salary data $($pay slips$)$ and daily, weekly, monthly report. You are required to advice the farmer's IT $($information Technology$)$ unit manager on the best possible operating systems capability required for this complex system.

$20$ Marks

B$.$ List $10$ operating system types

$10$ Marks

Question $2(33$Marks$)$

A$.$ One of the basic issues to consider when designing any operating system is security. Multiprogramming and time sharing are two environments which need careful considerations as they both require several users sharing the system simultaneously. State three $(3)$ security problem that can arise in these environments

$3$ Marks.

B$.$ Explain briefly how we can ensure the same degree of security in a time$-$shared machine as we have in a dedicated machine

$4$ Marks.

C$.$ Interrupt and trap are important functions in any operating system. Briefly describe Two $(2)$ use of each function

$6$ Marks.

D$.$ A process is a program in execution and during these executions, processes can move from between various stages. Assuming there are two processes $($Process A and Process B$)$ and these processes are in a ready queue. How would you describe the activities that happened whereby, Process A started first but process B completed first.

$12$ Marks

E$.$ Write the full names of the following acronyms

$8$ Marks.

i$.$ FCFS

ii$.$ SJF

iii. $RR$

iv$.$ CPU

v$.$ ALU

vi$.$ OS

vii. RAM

viii. ROM

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