problem1. In multitasking Operating Systems, there are two kinds of multitasking such as the “Preemptive Multitasking” and the “Cooperative Multitasking”. describe the two mentioned multitasking type and give a reason which of the two is better.

problem2. Provide the four major functions of operating system.

problem3. What is a modem and provide two different types of modems.

problem4. There are many different kinds of threats concerning computer security. describe two of such threats.

problem6. Distributed network architecture is whereby services are distributed and implemented among many computers. Give two merits and two demerits of the distributed architecture.

problem7. With the aid of diagram(s), describe how the star topology is different to the bus topology.

problem8. Why the use of firewall is significant.

problem9. describe in details the importance of encryption and how encryption and decryption work. Use a diagram to demonstrate your answer.