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Question:
(a) Answer the following questions based on the code snippet below.
1. int main (int argc, char *argv[]) 2. { 3. 4. pid_t processId; 5. 6. processId = fork (); 7. 8. 9. if (processId == 0) { 10. if (execl ("/usr/bin/ls", "ls", 0) == -1) { 11. perror ("execl failed "); 12. exit (1); 13. } 14. exit (0); 15. 16. } else { // processId greater than 0 case 17. wait (0); 18. exit (0); 19. } 20. return 0; 21. }
(i) Explain what happens after line 6 is executed.
(ii) Who (parent or child) executes code between lines 10-14?
(iii) Explain what is happening at line 10.
(iv) What is happening at line 17?
(b) Discuss why we have different processor modes and how these modes are used in typical operating systems.
(iii) (c) (i) What is meant by the term ‘affinity' in processor sheduling?
(ii) Discuss briefly the major issues that need to be addressed in designing multiprocessor operating systems.
Discuss any two of the following multiprocessor scheduling strategies
You have a system with two primary workloads. One performs sequential access to a set of large files, the other performs small, independent, random reads to a separate set of large
Page fault is a trap to the software gained by the hardware when a process accesses a page that is goes in the virtual address space, but not added in physical memory. In the har
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The swapper work s on the biggest scheduling priority. Initially it will look for any sleeping process, if not get then it will see for the ready-to-run process for swapping. Bu
What is the use of boot block? For a computer to begin running when powered up or rebooted it requires having an initial program to run. This bootstrap program tends to be easy
Q. What system calls have to be implementing by a command interpreter or shell in order to start a new process? Answer: In the UNIX systems a fork system call followed by an ex
Define ‘LRU’ page replacement policy LRU is Least Recently Used page replacement policy.
Remote IT Support Engineer Windows Systems Administrator Project Description: Need Windows base IT Support Engineer / Systems Network Administrator - perfectly MCSE qualified
Explain Processing Predefined Application Protocols Implementing and swift processing of predefined application protocols is sure to improve performance of server - side applic
Question: (a) What are the main challenges for Mobile Computing? (b) What is the ISM band and what is particular about this frequency band? Name two wireless technologies
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