Question 1: The following program consists of 3 concurrent processes and 3 binary semaphores. The semaphores are initialized as SO = 1, S1 = 0, S2 = 0. Process PO Process P1 Process P2 while(true) { wait(SO); print '0'; signal(S1); signal(S2); } wait(S1); signal(SO); wait(S2); signal(S0); What is the maximum number of times that PO can print "0"?
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- The block is practically a square-size placeholder for the Tile objects. But not all the spots are necessarily occupied. When the block is generated, we randomly pick the spots that will be filled in with tiles. All the tiles of a block must have the same color. write the code for these functions below private DynamicArray<DynamicArray<Tile>> block; // the internal storage of the block data public Block(int y, int x, int size) // this contructor creates a 2D placeholder of null value; //these values will be populated later with calls to setTile() public Block(int y, int x, int size, byte color) // overloaded constuctor that creates a 2D matrix with actual tile objects; //no need to call setTile afterwardsIn this project you are to design a process queue that is responsible for handling the process requests coming from different users. You have to take into consideration that users have different levels of privileges and priorities. Each user has an identification number and a password, in addition to process priorities. One good idea is to design the queue using an array or pointers while preserving the first-in first-out concept of the queue. For every process request received, the program should check the privileges of that request and whether it can be moved forward in the queue to be served by the operating system prior to serving the other requests. Using the programming language of your choice (preferably C+), write the process queue that would handle the user request. The program must allow for requests coming from different users or from one user.Implement in C programming language: Question 2 Write a c program that will generate the safe sequence of process execution for the situation given below:(Use Banker’s Algorithm). Note: The code can be implemented in several different ways, but make sure the parameter remains the same as shown below. n = 6; // Number of processes m = 4; // Number of resources int alloc[6][4] = { { 0, 1, 0, 3 }, // P0 // Allocation Matrix { 2, 0, 0, 3 }, // P1 { 3, 0, 2, 0 }, // P2 { 2, 1, 1, 5 }, // P3 { 0, 0, 2, 2 }, // P4 {1, 2 , 3, 1 } }; //P5 int max[6][4] = { { 6, 4, 3, 4 }, // P0 // MAX Matrix { 3, 2, 2, 4 }, // P1 { 9, 1, 2, 6 }, // P2 { 2, 2, 2, 8 }, // P3 { 4, 3, 3, 7 }, // P4 { 6, 2 , 6, 5 } }; //P5 int avail[4] = { 2, 2, 2, 1 };…
- b) Create the following path expressions. There can be only 4 instances of B at any given time, concurrently to this the processes A and C work maximally one instance in mutual exclusion. 4:(B), 1: (A; C) The process C has to be executed before th concurrent processes A and B. C:(A, B) Process A can be executed, after the process B or C have been finished. B and C can be active with two incarnations. 2: (B, C); A2. Implement the frame replacement algorithm for virtual memory In Java For this task, you need to perform the simulation of page replacement algorithms. Create a Java program which allows the user to specify: • the total of frames currently exist in memory (F), the total of page requests (N) to be processed, • the list or sequence of N page requests involved, For example, if N is 10, user must input a list of 10 values (ranging between 0 to TP-1) as the request sequence. Optionally you may also get additional input, the total of pages (TP) This input is optional for your program/work. It only be used to verify that each of the page number given in the request list is valid or invalid. Valid page number should be within the range 0, .. , TP-1. Page number outside the range is invalid. Then use the input data to calculate the number of page faults produced by each of the following page replacement algorithms: • First-in-first-out (FIFO) - the candidate that is the first one that entered…Write a C program which creates two childprocesses. One of the child processes mustopen data1.txt and fill it with 10 randomintegers (0-9). The other child process mustopen data2.txt and fill it with 10 randomletters (a-z). In the meanwhile, parent mustprint both child processes' id's and wait forthem to finish.
- Answer it is c++ only Chef recorded a video explaining his favorite recipe. However, the size of the video is too large to upload on the internet. He wants to compress the video so that it has the minimum size possible. Chef's video has N frames initially. The value of the th frame is A₁. Chef can do the following type of operation any number of times: • Choose an index i (1 ≤ i ≤ N) such that the value of the ith frame is equal to the value of either of its neighbors and remove the ith frame. Find the minimum number of frames Chef can achieve. Input 1 1 5 output 1Write a C or C++ program that performs runs of the following process scheduling algorithms: *Shortest remaining time (SRT) [preemptive] *Round robin (RR) [preemptive] Run each scheduling algorithm for 100 quanta (time slices), labeled 0 through 99. Before each run of an algorithm, create 20 simulated processes. Each simulated process is simply a small data structure that stores information about the process that it represents. For each simulated process, randomly generate: • An arrival time: a float value from quanta 0 through 99. • An expected total run time: a float value from 0.1 through 10 quanta. • A priority: integer 1, 2, 3, or 4 (1 is highest) • Include any other attributes that you may need Tip: While debugging your program, you may want the same pseudo-random numbers each time. For this to happen, you should set the seed of the random number generator to a value, such as 0. Read about the rand() and srand() functions for C and C++: Assume only one CPU and one ready queue.…My task from the teacher is to create a program that solves the three problems using threads in Python: 2 files: reader.py and writer.py In the readers-writers problem there is a common resource where a group of actors called readers want to read from the resource and another group of actors called writers want to write to the resource. The basic synchronization problem that needs to be solved is:1. Mutual exclusion of the resource, where:• only one writer may print at a time, and• no writer may write while a reader is reading.An ordinary mutex lock that is applied equally to all actors can solve this but will lead to only one actor being able to enter its critical section at a time. This is a problem as we normally want several readers to be able to read at the same time. The next problem that needs to be solved is therefore the following: 2. Several readers should be able to read the resource at the same time.In a solution where several readers can read simultaneously and lock out…
- You are required to make changes in the above programs and introduce the use of compaction where required. Write code to simulate Worst-Fit Algorithm TASK2: DESCRIPTION One of the simplest methods for memory allocation is to divide memory into several fixed-sized partitions. Each partition may contain exactly one process. In this multiple-partition method, when a partition is free, a process is selected from the input queue and is loaded into the free partition. When the process terminates, the partition becomes available for another process. The operating system keeps a table indicating which parts of memory are available and which are occupied. Finally, when a process arrives and needs memory, a memory section large enough for this process is provided. When it is time to load or swap a process into main memory, and if there is more than one free block of memory of sufficient size, then the operating system must decide which free block to allocate. Best-fit strategy chooses the block…EXCERSICES 1. Use the template below to write a C-program that creates two processes: "Process A" (the process with which the program starts execution) and "Process B" (A's child). The Process A forks Process B. To identify which process writes the output, each process puts its id at the beginning of each line (see the sample output). Each process performs the following operations. Process A: After spawning Process B, it waits for Process B to terminate. After Process B's termination, it will write your home directory (use HOME environment variable) and its process ID, and terminates. Process B: After being spawned from Process A, it sleeps for three seconds (using sleep(). Then, it writes process IDs of itself and Process A immediately. After that, executes ps command (using system library) and terminates. Sample output: -/a.out 9181:1 am the parent, I will create child process 9182:1 am the child, I will sleep for 3 seconds 9182:My parent pid is 9181 9182:the ps command PID TTY TIME…You are required to make changes in the above programs and introduce the use of compaction where required. Write code to simulate Worst-Fit Algorithm TASK2: DESCRIPTION One of the simplest methods for memory allocation is to divide memory into several fixed-sized partitions. Each partition may contain exactly one process. In this multiple-partition method, when a partition is free, a process is selected from the input queue and is loaded into the free partition. When the process terminates, the partition becomes available for another process. The operating system keeps a table indicating which parts of memory are available and which are occupied. Finally, when a process arrives and needs memory, a memory section large enough for this process is provided. When it is time to load or swap a process into main memory, and if there is more than one free block of memory of sufficient size, then the operating system must decide which free block to allocate. Best-fit strategy chooses the block…