Give two separate examples when a process changes its state to waiting and ready from the running state.
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- Exercise 2: Draw a State machine Diagram for a Telephone line (a process in a smartphone OS) with the following behavior: When the telephone app is not active, the telephone line is idle. When the app is activated, the line gives a dial tone and can accept the dialing of digits. If after getting the dial tone, the user doesn't dial a number within a time interval of 10 seconds, then a time-out occurs, and the line gets idle again. A button on the app can re- activate the line. After dialing a number, if the number is invalid then a recorded message is played at the end of which the line becomes idle. Upon entry of a valid number, the phone app tries to connect a call & routes it to the proper destination. If the called person answers the phone, the conversation can occur, and the line is in an on- call state. When the called person hangs up, the phone app disconnects and the line goes to the idle state.sleep() is a system call? What are the steps that occur from the time when a call to sleep() is made by a process up to the time that it returns?c) Give two separate examples when a process changes its state to waiting and ready from the running state.
- Interrupts are system wide events that stop the execution of a currently running process. Examples of interrupts include (but are not limited to) mouse clicks, process termination, key presses, etc. Some interrupts are considered as more important to be handled first then the others. For example, a hardware interrupt such as hard drive read operation has lesser priority than a memory read. In this way, the most appropriate data structure for representing of such events is the priority queue. Demonstrate by writing an algorithm or a flowchart how to insert the following interrupts in a heap so the highest priority element should move out first. Interrupts Priorities INT 0 100 INT 10 51 INT 11 52 INT 21 54Write the process scheduling of the following ScenarioInterrupts are system wide events that stops the execution of a currently running process. Examples of interrupts include (but are not limited to) mouse clicks, process termination, key presses, etc. Some interrupts are considered as more important to be handled first then the others. For example, a hardware interrupt such as hard drive read operation has lesser priority than a memory read. In this way, the most appropriate data structure for representing of such events is the priority queue. Demonstrate by writing an algorithm or a flowchart how to insert the following interrupts in a heap so the highest priority element should move out first. Interrupts Priorities INT 0 100 INT 10 51 INT 11 52 INT 21 54
- Early computer systems allowed only one process to be executed at a time. In contrast, current computer systems allow multiple programs to be loaded into memory and executed concurrently. This evolution requires the concepts of 'process', which is a program in execution, and 'process state'. a) Draw the Seven-State Process Model. b) Explain "when" or "why" a process moves from one state to an other. c) Knowing that at time t, processes P1, P5 and P2 are in the ready state, and processP7 is waiting for the disk to complete its service; use process control blocks (PCB) and queue structures to draw the interesting queues of the system at time 't', and at time 't+1', when the request of process P7 is completed.Please define wait()'s role in process termination if you have a code example.Write a system program in C that creates a process fan of 10 processes. Each child process will calculate the number of non-prime factors of its parent process id. Also the parent process must wait for all its child processes to terminate. Your answer
- A process loop, or machine cycle, consists of the following four subcomponents. In what ways do machine cycles matter the most? Is it necessary to replace worn or broken machine components throughout a cycle? How about creating another module to solve the issue of swapping?56. In the multiprogramming system, a set of processes is deadlock if each process in the set is waiting for an event to occur that can be initialized only by another process in the set. Which of the following is not one of the four conditions that are necessary for deadlock to occur? a. nonpreemption b. process suspension c. partial assignment of resources d. circular waitQuestion. 4 Is it possible for a process to execute another piece of code instead of its current program? Write all the possible ways that could be adopted in different scenarios and write small pieces of codes to demonstrate each possible scenario. In all the cases, check whether the ids of child and parent process change or remain unchanged.