Q1 What are three objectives of an OS design? Discuss the benefits and drawbacks of each of these design decisions. [5] Q2 Explain in detail the structures of a monolithic kernel and a microkernel approach to operating systems design. Discuss the advantages of each approach and shortcomings between each of the two approaches. How does the concept of modules improve both approaches? [10] Q3 Define multiprogramming and time-sharing systems and then explain why operating systems evolved from multi-programmed batch systems to time- sharing systems