The portion of the process scheduler in an operating system that dispatches processes is concerned with ____________ a) assigning ready processes to CPU b) assigning ready processes to waiting queue c) assigning running processes to blocked queue d) all of the mentioned
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The portion of the process scheduler in an
a) assigning ready processes to CPU
b) assigning ready processes to waiting queue
c) assigning running processes to blocked queue
d) all of the mentioned
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- A program becomes a process when it is an active entity loaded in main memory. max 0 T ↑ What region is used for communication/data sharing between processes? stack sparse address space text data heap no option is correctTASK: 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 that is closest in size to the request. First-fit chooses the first available block that is large enough. Worst-fit chooses the largest available…Main Memory (MM) and Central Processing Unit are important resources of the computer system that must be carefully managed. The part of Operating System (OS) that manages the memory is called Memory Manager. 'Partition' is a memory management scheme, which allocates processes in MM into a unique fixed-size partition; each partition contains exactly one process. When a partition is free, the OS selects a process from the input queue and loads it into the free partition; when the process terminates, the partition becomes available; a free partition is called 'hole'. Please, reply to the following questions by giving your own ORIGINAL and UNIQUE answers: a) Draw a picture of the Main Memory (MM) divided into A 'assigned partitions' and B 'holes': fix your values for A and B1, and draw the corresponding MM layout. In the following, Pi, Pj and Pk are three processes residing in MM b) Considering the 7 states diagram, answer to the following questions: 1) Can Pi be in the 'New' state? Why?…
- in C++ please create a Priority : -pre-emptive algorithm code: here are information that will help you Tasks: • Lab 4: Process management • Review Process management algorithms Definitions: (in terms for this lab not formal definitions) • Preemptive: When a new process arrives and has a higher priority than the current running process, Then the current running process is paused and put back in the waiting queue, and the new process starts executing. In most systems it will automatically interrupt the current running job when the new job arrives, however some systems use a predetermined interval (a certain number of time units), to check for new jobs. • Non preemptive: Take no action when a process with higher priority arrives,when a new process with a higher precedence arrives current running process need to finish first before the new process goes Oxford definition: Preempt – to take action in order to prevent (an anticipated event) from happening; forestall. • Metric: a metric is…106. If we preempt a resource from a process, the process cannot continue with its normal execution and it must be : a. aborted b. rolled back c. terminated d. queuedascading termination refers to the termination of all child processes if the parent process terminates ______a) Normally or abnormallyb) Abnormallyc) Normallyd) None of the mentioned
- Critical Sections - Select all of the following statements that are true A critical section is a segment of code in which a process has write-access to data or resources that are shared with at least one other process. Every process waiting to enter a critical section must be allowed to enter it at some point. No eternal waiting must be possible. In a system consisting of n processes, a critical section protected by a mutex variable can be accessed by more than one process at a time. A process not executing in a critical section must not prevent other processes from entering the critical section. Critical sections must never contain data shared by multiple processes. O DELL W7. When several processes access the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place is called ________ i) dynamic condition ii) race condition iii) essential condition iv) critical conditionPath: p A system with two dual-core processors has four processors available for scheduling. A CPU-intensive application is running on this system. All input is performed at program start-up, when a single file must be opened. Similarly, all output is performed just before the program terminates, when the program results must be written to a single file. Between start-up and termination, the program is entirely CPU-bound. Your task is to improve the performance of this application by multi-threading it. The application runs on a system that uses the one-to-one threading model (each user thread maps to a kernel thread). 1 How many threads will you create to perform the input and output? Explain shortly. 2. How many threads will you create for the CPU-intensive portion of the application? Explain shortly.
- Process States: Select all of the following statements that are true. Hardware interruptions are the only causes for process state changes. The process state ZOMBIE is assigned to a process that is terminated and removed from memory, but still has an entry in the management structures. A process in the state WAITING/BLOCKING can directly change to the state RUNNING when a respective signal arrives. The process state "SWAPPED OUT AND BLOCKED" is assigned to a process that is currently blocked and not in main memory. A child process whose parent has terminated is referred to as an orphan. A parent process may terminate the execution of its children processes.Description:The project I am working on needs to demonstrate how two processes (parent and child) can communicatethrough a shared memory region, with the child process writing a value to the shared memoryand the parent process reading that value. This is my code and I wont run. Can you help: #include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <sys/ipc.h>#include <sys/shm.h>#include <unistd.h> #define SHM_SIZE 1024 /* shared memory size */ void error_exit(const char *msg) { perror(msg); exit(EXIT_FAILURE);} int main() { key_t key; int shmid; char *data; // Create a unique key for shared memory if ((key = ftok("shared_memory.c", 'R')) == -1) { error_exit("ftok"); } // Create the shared memory segment if ((shmid = shmget(key, SHM_SIZE, 0644 | IPC_CREAT)) == -1) { error_exit("shmget"); } // Attach the shared memory segment to our data space data = shmat(shmid, (void *)0, 0); if…Operating system is a resource allocator so a. It provides system call to abstract the access to the different resources b. It prevents an unprivileged process from accessing a memory location related to another process c. it provides a command line interface that helps to access the system resources d. It controls the CPU time sharing among the processes in the ready queue