Question 1: Compare and contrast the following types of operating systems. Be sure to include when they are, or are not appropriate to use Batch Interactive Time-slicing (time-sharing) Real-time Distributed Question 2: What are the differences between a program, an executable, and a process? Question 3: Let an OS supports a system call sleep, which puts the program making the call to sleep for the number of seconds indicated in the argument of the sleep call. Explain how this system call may be implemented. [HINT think in terms of timer] Question 4: What happens on a context switch? Should context switches happen frequently or infrequently? Explain your answer Question 5: Consider an interprocess-communication that uses mailboxes mailbox:send (ToID, msg) mailbox:receive (FromID, msg) 17receive msg from process id, FromID // send msg to Process Id, ToID Is it possible for a process to wait to get a message from any one of a number of processes? If your answer is yes, te a program pseudo code that does s Now, consider the case that we add a new mailbox primitive mailbox:empty (FromID) I returns false if no msg in mailbox, o. // return true otherwise Use it to write pseudo code for a program that waits for a message from any one ofa number of processes. Assume there are total of n processes, numbered: 0 through (n-1) Question 6: Consider a multiprocessor system and a multithreaded program written using the many-to-mamy threading model. Let the number of user-level threads in the program be greater than the number of processors in the Discuss the performance implications ofthe following scenarios a. b. C. The number of kernel threads allocated to the program is less than the number of processors. The number of kernel threads allocated to the program is equal to the number of processors. The number of kernel threads allocated to the program is greater than the number of processors but less than the number of user-level threads