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.
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- Operating Systems Project: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.use c++ to Implement a city database using a BST to store the database records. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x- and y-coordinates. The BST should be organized by city name. Your database should allow records to be inserted, deleted by name or coordinate, and searched by name or coordinate. Another operation that should be supported is to print all records within a given distance of a specified point. Collect running-time statistics for each operation. Which operations can be implemented reasonably efficiently (i.e., in O(log n) time in the average case) using a BST? Can the database system be made more efficiently by using one or more additional BSTs to organize the records by location?Create a program in C that will run two different scheduling algorithms and compare the waiting time of each process and the average waiting time of the complete set of processes. The program will begin by getting the processes file as an inline parameter and will read the contents in an array. The program will then create a child process to run the FCFS scheduling algorithm and then another child to run the SJF algorithm. Each child will print the waiting time of each process when it finishes and the average waiting time when all processes are complete. Example: FCFS: P1 Waiting time: 0 FCFS: P2 Waiting time: 10 FCFS: P3 Waiting time: 25 SJF: P1 Waiting time: 10 SJF: P2 Waiting time: 0 SJF: P3 Waiting time: 25 FCFS: Average Waiting Time: 35/3 SJF: Average Waiting Time: 35/3
- 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.use c++ to Implement a city database using a BST to store the database records. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x- and y-coordinates. The BST should be organized by city name. Your database should allow records to be inserted, deleted by name or coordinate, and searched by name or coordinate. Another operation that should be supported is to print all records within a given distance of a specified point. Use following two classes: struct city { /* add the city attributes and pointers to left and right child nodes*/ } class CityDB { /* create a BST for a City Database here in this class */ } Note: The distance formula is , where x1,y1 are coordinates of city 1 and x2, y2 are coordinates of city 2.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…
- 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…Interrupts 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 54Perform the given task.
- Please DO NOT respond to this question by copy/pasting the code provided elsewhere on the site, none of those work. Thanks. Virtual Memory Lab This lab project addresses the implementation of page-replacement algorithms in a demand-paging system. Each process in a demand-paging system has a page table that contains a list of entries. For each logical page of the process, there is an entry in the table that indicates if the page is in memory. If the page is in memory, the memory frame number that page is resident in is indicated. Also, for each page, the time at which the page has arrived in memory, the time at which it has been last referenced, and the number of times the page has been referenced since the page arrived in memory are maintained. The page table data structure is a simple array of page-table entries (PTEs). Each PTE contains five fields as defined below: struct PTE { int is_valid; int frame_number; int arrival_timestamp; int…Use the started code provided with QUEUE Container Adapter methods and provide the implementation of a requested functionality outlined below. This program has to be in c++, and have to use the already started code below. Scenario: A local restaurant has hired you to develop an application that will manage customer orders. Each order will be put in the queue and will be called on a first come first served bases. Develop the menu driven application with the following menu items: Add order Next order Previous order Delete order Order Size View order list View current order Order management will be resolved by utilization of an STL-queue container’s functionalities and use of the following Queue container adapter functions: enQueue: Adds the order in the queue DeQueue: Deletes the order from the queue Peek: Returns the order that is top in the queue without removing it IsEmpty: checks do we have any orders in the queue Size: returns the number of orders that are in the queue…A "service" transaction results in a print request being removed from the priority queue and the customer name being displayed on the console. A transaction containing the string "end-of-file" will signal the end of the input. Your program will display the number of print requests remaining in the queue when the "end-of-file" transaction is processed. Sample input transactions and output expected using a priority queue: 2-01-guo 1-02-hannie 3-03-ian service (output: 1-02-hannie) service (output: 2-01-guo) 1-04-danny 3-05-eli 1-06-fan service (output: 1-04-danny) service (output: 1-06-fan) end-of-file (output: There are 2 remaining print requests in the queue.) 1