17. To ensure that the hold and wait condition never occurs in the system, it must be ensured that ____________ a) whenever a resource is requested by a process, it is not holding any other resources b) each process must request and be allocated all its resources before it begins its execution c) a process can request resources only when it has none d) all of the mentioned

17. To ensure that the hold and wait condition never occurs in the system, it must be ensured that ____________ a) whenever a resource is requested by a process, it is not holding any other resources b) each process must request and be allocated all its resources before it begins its execution c) a process can request resources only when it has none d) all of the mentioned

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter11: Operating Systems

Section: Chapter Questions

Problem 20VE

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78. To ensure no preemption, if a process is holding some resources and requests another resource that cannot be immediately allocated to it : a. then the process waits for the resources be allocated to it b. the process keeps sending requests until the resource is allocated to it c. the process resumes execution without the resource being allocated to it d. then all resources currently being held are preempted
5. A state is safe if the system can allocate resources to each process (up to its maximum) in some order and still avoid deadlock. Then a. deadlocked state is unsafe b. unsafe state may lead to a deadlock situation c. deadlocked state is a subset of unsafe state d. all of these
50. Match the following.i) Mutual exclusion a) A process may hold allocated resources while waiting assignment.ii) Hold and wait b) No resource can be forcibly removed from a process holding it.iii) No preemption c) Only one process may use a resource at a time. a. i-a, ii-b, iii-c b. i-a, ii-c, iii-b c. i-b, ii-c, iii-a d. i-c, ii-a, iii-b
QUESTION 1 With suitable illustration, discuss the relationship between processes and threads and how a process is created in Windows. ii. Explain the term structured exception handling (SEH) as used in systems programming and give a practical example to illustrate how it can be used to handle errors in a block of code. 2. Discuss with suitable illustration how memory mapped files can be used in memory management ii. Using the Win32 API, write a system program to create a process with a single thread. The process should be used to execute an existing program. After successful running of the process, display the process ID and thread ID. Compile and run the program and copy the source code into your answer booklet 3. Distinguish between static libraries and dynamic link libraries (DLLs) in the context of memory management and give advantages and disadvantages of each. ii. Explain the concept of inheritable handle in process management
. In order to keep track of the state of each running process, the operating system creates a _____________ for each. process control block linked list CPU thread Which PCB fields below can have their values changed when a process is in "Running" state. parent, children, open_files process_state, children process_state, open_files children, open_files . Considering the implementation of a process create() function, select the correct choice for each of the following when the function is executed to create a process p. p.process_state = p.parent = p.children = p.cpu_state = READY, BLOCKED, NULL, RUNNING
Which of the following best describe the idea of limited direct execution? It is the virtual address space (q.v.) which provided the operating system with the greatest facility to control processes in such a way as to grant and remove access to system resource on demand. A process must be able to use the system resources of CPU, memory and I/O without having complete control over the entire system, effectively overthrowing the operating system - all while providing a mechanism for the OS to regain control from that process and grant the same privilege to another process. An operating system must be able to grant limited time to a process at which point it removes that process from the CPU and grants time to another process. The CPU must be virtualized so that processes cannot execute privileged instructions in a non-privileged context. This is done by pretenting that those instructions do not exist in the user space and only execute NOP's.
QUESTION 1 With suitable illustration, discuss the relationship between processes and threads and how a process is created in Windows. Explain the term structured exception handling (SEH) as used in systems programming and give a practical example to illustrate how it can be used to handle errors in a block of code. Discuss with suitable illustration how memory mapped files can be used in memory management Using the Win32 API, write a system program to create a process with a single thread. The process should be used to execute an existing program. After successful running of the process, display the process ID and thread ID. Compile and run the program and copy the source code into your answer booklet Distinguish between static libraries and dynamic link libraries (DLLs) in the context of memory management and give advantages and disadvantages of each. Explain the concept of inheritable handle in process management
59. A system is in the safe state if a. the system can allocate resources to each process in some order and still avoid a deadlock b. there exist a safe sequence c. all of the mentioned d. none of the mentioned
16. When two or more processes attempt to access the same resource a _________ occurs. a. Critical section b. Fight c. Communication problem d. Race condition
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…
43. From the following statements which one is not a valid deadlock prevention scheme? a. Number the resources uniquely and never request a lower numbered resource than the last one b. Release all the resources before requesting for a new resource c. Request all the resources before execution d. Never request a resource after releasing any resources
With suitable illustration, discuss the relationship between processes and threads and how a process is created in Windows. Explain the term structured exception handling (SEH) as used in systems programming and give a practical example to illustrate how it can be used to handle errors in a block of code. Discuss with suitable illustration how memory mapped files can be used in memory management Using the Win32 API, write a system program to create a process with a single thread. The process should be used to execute an existing program. After successful running of the process, display the process ID and thread ID. Compile and run the program and copy the source code into your answer booklet Distinguish between static libraries and dynamic link libraries (DLLs) in the context of memory management and give advantages and disadvantages of each. Explain the concept of inheritable handle in process management