c$)$ Systems Administrators often do comparative analysis of the

efficiency of various input$-$output communication techniques that are

used in computer systems. Discuss one Input$-$Output communication

technique that is used in a computer system; and outline the steps

involved.

d$)$ Operating systems perform many objectives$/$functions in a computer

system and to computer users. Discuss the three main objectives or

functions of operating systems.

$[$Total: $25$ marks$]$

a$)$ Operating systems protect the computer hardware and its

components. They also perform many responsibilities and$/$or

provide services to manage various resources of the computer

system as well as promote the efficiency of use of the computer

systems.

Discuss how an operating system protects computer hardware,

processor, main memory, and input$-$output devices of computer

system; and provide appropriate practical examples to illustrate your

answer.

b$)$ Operating systems provide valuable services for efficient operation

of computer systems.

Explain the responsibilities and$/$or services that an operating system

provides for efficient operation of computer systems in

organizations.