Question $4[20$ Marks$]$

An Operating system $($OS$)$ is a software that acts as an interface between the end user and computer hardware. Every

computer must have at least one OS to run other programs. Discuss any FIVE $(5)$ characteristics or features of an OS$.$

Question $5[20$ Marks$]$

Once a new information system is developed $($or purchased$),$ the organization must determine the best method for

implementing it$.$ Critically evaluate the types of implementation methods an organization can consider when

implementing a new or purchased information system.

Question $6[20$ Marks$]$

Firewall is a network security device that observes and filters incoming and outgoing network traffic, adhering to the

security policies defined by an organization. Essentially, it acts as a protective wall between a private internal network

and the public Internet. Report on the steps you would follow to configure a firewall for network security.