All of the instructions in a System function call in a user-program are executed in kernel-mode.
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true or false
a. All of the instructions in a System function call in a user-program are executed in kernel-mode.
b. A process immediately upon creation at t=0 creates 10 threads; each of the threads intends to sleep for 2sec and then execute code for 4sec. In the mean-time the process terminates after the thread creation task that lasts 1sec. It is possible that the wall-clock (outside clock) time of the execution of a thread will be more than 40sec.
c. The PCB of a process is stored in an individual process's memory in user-space.
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- Solve the following problem in C programming language: Four threads will run in parallel. The threads have a shared variable x. The initial value of x is equal to 0. The critical section of Thread1 and Thread3 will increment the value of x by 1, while the critical section ofThread2 and Thread4 will decrement the value of x by 2. The program will return the final value of x which will be equal to 2.The following question is related to Threading Task-1: Write a c program that creates 5 threads and prints which thread is running and after the thread is closed, a new thread starts its execution. Each thread should run sequentially one by one. OUTPUT: thread-1 running thread-1 closed thread-2 running thread-2 closedThis may be accomplished by analyzing the scheduling of processes and threads side by side and comparing and contrasting the two.
- 6. Initial value of shared variable m is equal to 0 and it is stored at memory address 1100. Four threads A, B, Y, Z use this variable as follows: Processes A and B increase the value of m by 1. Processes Y and Z decrease the value of m by 1. Since m is shared, each process protects the critical region using semaphore S initialized to 2. Write the sequence of operations so that after each thread is executed once, the value of m is equal to -2.3 assume the code is used S=2 Proses A A1: W(S) A2: LOAD m, 1100 A3: ADD 1 A4: MV A, 1100 A5: S(S) Proses B B1; W(S) B2: LOAD m, 1100 83: SUBT 1 B4: MV A, 1100 85: S(S) Proses Y Y1: W(S) Y2: LOAD m, 1100 Y3: ADD 1 Y4: MV A, 1100 Y5: S(S) Proses 2 21: W(S) 22: LOAD m, 1100 23: SUBT 1 24: MV A, 1100 25: S(S)10 Write a C program that creates five threads (in addition to the initial thread) and makes each execute a function task(void * i) for i integer ranging from 1 to 5. in this function, make an empty loop of 10000 steps, then display of the i number and the thread id on the screen. The initial thread will also perform the display. Check on this example that: — The use of the exit() function in one of the threads of the process leads to the termination of all the threads. — The termination of the initial thread leads to the release of all the resources, therefore the termination of all the threads of the process. How to avoid this premature termination?(b) With the aid of diagrams show the difference between busy wait and thread scheduler.
- Is it possible for a parent process to wait for the termination of his child process and then to continue working on his own task? How can it be done using threads where a thread could be bound to wait for the termination of another thread and then continue working on his task. Write a piece of code to demonstrate both these cases in a single program. This is the Question from System ProgrammingA deadlock condition can occur in concurrent code if two or more threads each hold a resource and are waiting for another thread to release a resource they need to proceed. Question 10 options: True FalseConsider a problem that arises when the operating system of a computer employs many threads to do the same operation.
- OCCURS WHEN MULTIPLE PROCESSES OR THREADS READ AND WRITE DATA ITEMS SO THAT THE FINAL RESULT DEPENDS ON THE ORDER OF EXECUTION OF INSTRUCTIONS IN THE MULTIPLE PROCESSES, Select one: a.COMPETING PROCESSES b.CRITICAL SECTION c.MUTUAL EXCLUSION d.RACE CONDITIONWrite an ALP program for ARM Cortex M3/4 to perform the following(1) SVC is to be called from an application task running at Thread unprivileged mode.(2) Two parameters are passed to the handler via R1, R2.(3) If the SVC number is last 3 digits of your Student ID (0 to 255) or last 2 digits of your Student ID (if last 3-digits of Student ID > 255), then the addition of the data in R1, R2 should be performed and after that return and resume application task.(4) If the SVC number is not your Student ID (3 or 2 digits), then return and resume application task.Give suitable screen shots of the KEIL IDE-in debug mode to demonstrate the desired outputs. Ensure that the screenshot captures system time & day.Below Program can be used (basic skeleton)as below to perform the above conditions . AREA RESET, CODE, READONLYin DCD 0x20000100,0x8000005D, 0,0,0,0,0,0,0,0,0,SVC_handler+1,0,0,0,0,0,0,0,0,0,0,0 ENTRY MAIN LDR R1,=0X20000200 MSR PSP,R1 MOV R0,#3…Why is it preferable in a cooperative multithreading system for two threads to communicate with each other via the event queue rather than directly? What are some of the drawbacks of direct communication?