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1. (20 pts) What is the purpose of system calls, and how do system calls relate to the OS and to the concept of dual-mode

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1. (20 pts) What is the purpose of system calls, and how do system calls relate to the OS and to the concept of dual-mode (kernel-mode and user-mode) operation? Question 3 (40 pts) Figure 2 contains seven states. In principle, one could draw a transition between any two states, for a total of 42 different transitions. Figure 2: Process state transition diagram 1. List all of the possible transitions and give an example of what could cause each transition. 2. List all of the impossible transitions and explain why

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