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What are the benefits of multiprogramming and estimation in operating system? 2) What is the dual mode in operating system? Explain the purpose of dual

What are the benefits of multiprogramming and estimation in operating system?

2) What is the dual mode in operating system? Explain the purpose of dual mode.

3) Assume that process p1 is running in CPU, for some reason, OS switches p1 out for p2 and later switches p1 back. Elaborate this procedure in terms of PCB.

4) What are I/O-bound process and CPU-bound process? Why do we need to keep balance between them and which scheduler is in charge of that?

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