4. The following is the memory configuration at a given point in time where dynamic partitioning scheme is used. The shaded areas indicate memory spaces already allocated to other processes, while the white spaces are holes (free memory spaces). The next FOUR (4) memory requests are 30M, followed by 50M, 20M and 40M (in order). Shade and indicate clearly which memory block will be allocated to each request using the first- fit and next-fit placement algorithms. (First-fit) 20M (Best-fit) 20M (Next-fit) 20M 80M 80M 20M 80M 20M (X is the lastest allocated block) 20M 50M 50M 50M 10M 10M 10M X 30M 30M 30M
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- In 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.Suppose your system has a memory of size 100 MB using contiguous memory allocations and there are 4 fixed size partitions. Partition one of size 50, partition 2 of size 200, partition 3 of size 100 and partition 4 of size 150 Consider First 5 letters of your name. The ASCII code of the letters is the size of process and the alphabet is the name of process. The processes appear in alphabetical order. Q= How many processes will be loaded in the memory at a time? For contiguous memory allocation show the algorithms used to allocate memory partitions to each process and state which algorithm will work best and why? Also state the amount of internal and external fragmentation for the processes and partitions after allocation NOTE :MY NAME IS ALIZAHIDSuppose we have the following memory allocator setup for the block headers. Note this model may be slightly different from the book and project. Headers are single 4-byte integers and store both the size of the block and meta information packed into 32 bits. The unused bits after the size is stored are used to store the meta-information. Memory requests must be in multiples of 8. How many bits at the end of the 4-byte header can be used to store meta-information?
- Assignment/Lab 9 In this lab, your task is to develop a simple address book tool. The tool maintains contact information of people. For each person, the tool maintains name and date of birth. Contact information consists of physical address and phone number. For physical addresses, the system must be able to maintain current and previous addresses. Current/active address information should have starting date and no end date, previous addresses must have a starting date and an ending date. A person cannot have multiple active physical address. For phone number, the system must maintain active phone numbers only, no previous phone numbers. For implementation, use MySQL database system. MySQL is open source and is available for Linux as well as Windows. For software application, use Python. The tool/application must support the following functionality: 1- Search current contact information by last name, the user enters last name, the system must locate active physical address and phone…Producer-Consumer Problem Variation. In class, we reviewed the Producer-Consumer problem, which used semaphores to control access to a bounded buffer where a Producer process would produce data items and add them to the buffer and one Consumer would remove data items from the buffer and consume them (please refer to slide 18 in the Week 9 PowerPoint or Figure 5.16 in the course textbook for the pseudocode for this problem). As a variation of that problem, assume the bounded buffer size is 12. Assume the Producer process enters 3 items at a time into the buffer. It will only do this if there are at least 3 empty spots in the buffer. Assume the Consumer process will remove items 2 at a time, and will only do so if there are at least 2 items in the buffer. In addition to the Producer and Consumer processes, assume there is a third Hybrid process. Each time it accesses the buffer its role changes. One time it is a Producer entering a single item, and the next time it is a Consumer removing…3. We've seen variable types that store characters, integers and floating point numbers. In a very similar fashion, addresses can be are stored. A variable that stores an address value is called a pointer variable, or simply a pointer. Let's take a look at the following example. As you may have noticed, we did not directly assign anything to num, c, count, and salary. Instead, we used the pointers to assign values to where those pointers were pointing. What does this program do? Can you make changes to assign anything to num, c, count, and salary and print them using pointers numptr, cptr, countptr, and salaryptr. #include using namespace std; int main() { int num; char c; int count; float salary; // Declaring bunch of pointers that point to nothing (point to null) // declare a pointer variable to an integer // declare a pointer variable to a character // declare a pointer variable to an integer int char *numptr; *cptr; *countptr; *salaryptr; // declare a pointer variable to a float…
- Write a C program which takes four command line arguments: two file names and twonumber of elements. Your program must check if correct number of arguments aresupplied and terminate if not. Your main process must create three processes: The firstand second processes must open / create files by the given names and fill them with thegiven number of random integers (one integer per line) and terminate. The thirdprocess must execute “sort” command with necessary arguments so that it numericallysorts both files and display the combined result on screen.Before creating the third child process, main process must wait for the other two child processes to end.Student information is being held in a data area, where each student record has the following format: The first nine bytes are the student number, held in ASCII The next byte is the course mark The next word is the section identifierThere are well over three hundred such student records that have been loaded sequentially into memory starting at address $10000. The last record loaded is a dummy record with a section identifier of $FFFF, to show the end of the records.Write an assembler subroutine GetMax that will scan the entire list and find the highest mark. If there is a tie, the first student in the list with the highest mark should be found. The subroutine should return the starting address of this record in address register a3.Given the following: Logical Memory size of 1000 Physical Memory size of 2000 Page (and frame) size of 100 Block A contains data for a program Select Block A’s size and its starting point in both memories. Then write the page table for Block A based on your selections. See below for the layout of both memories and an example of Block A of size 200. Logical Memory Physical Memory location/ page location/frame 0 to 99/ 0 0 to 99/ 0 100 to 199 /1 Block A 100 to 199/ 1 200 to 299/ 2 Block A 200 to 299/ 2 300 to 399/ 3 300 to 399/ 3 400 to 499/ 4 400 to 499/ 4 500 to 599/ 5 500 to 599/ 5 600 to 699/ 6 600 to 699/ 6 700 to 799/ 7 700 to 799/ 7 800 to 899/ 8 800 to 899/ 8 900 to 999/ 9 900 to 999/ 9 1000 to 1099/ 10 1100 to 1199/ 11 1200 to 1299/ 12 1300 to 1399/ 13 Block A 1400 to 1499/ 14 Block…
- Consider a program consists of five segments: S0 = 600, S1 = 14 KB, S2= 100 KB, S3 =580 KB and S4 = 96 KB. Assume at that time, the available free space partitions of memory are 1200–1805, 50 – 150, 220-234, and 2500-3180.Find the following:a. Draw logical to physical maps and segment table?b. Allocate space for each segment in memory?c. Calculate the external fragmentation and the internal fragmentation?d. What are the addresses in physical memory for the following logical addresses: 0.580, (b) 1.17 (c) 2.66 (d) 3.82 (e) 4.20?In this assignment, you will implement a simple OS scheduler using C/C++. The scheduler's task is to receive a set of processes and their details, and then decide the order of executing these processes based on the chosen algorithm. Finally, the scheduler will output the order of process execution, in addition to some stats about each of the processes. The scheduling algorithm chosen for this assignment will be SJF (Shortest Job First). The input will start with an integer N, representing the number of processes, followed by N lines (one for each process). For each line i, the line will start with a strings, representing the process name, followed by 2 numbers representing the arrival time and processing time for the ith process, respectively. Your program should print a line indicating the order of executing the processes. Then, for each process, the program should print a line showing the process's name, response time, turnaround time, and delay. See the sample output below for…Student information is being held in a data area, where each student record has the following format: The first nine bytes are the student number, held in ASCII The next byte is the course mark The next word is the section identifier There are well over three hundred such student records that have been loaded sequentially into memory starting at address $10000. The last record loaded is a dummy record with a section identifier of $FFFF, to show the end of the records. If a2 has the address of a student record, if using indexed addressing mode, what is the index value X such that X(a2) addresses the course mark?