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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
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What are the steps followed in testing? i. Unit testing - The individual components are tested in this type of testing. ii. Module testing - Related collection of independen
What is a sequential file? A file that is read one record or block or parameter at a time in order, based on a tape model of a file.
What are the features of Operation Research approach?
What is an operating system and what are the different types of operating systems? Operating System An Operating System or OS is a software program that allows the compute
Question: a) Windows Server 2003 has brought great enhancements the Server System as compared to the previous version. Write down short notes on the below listed enhancements.
unequal size partition
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Define spooling. A spool is a buffer that holds output for a device, like printer, that cannot accept interleaved data streams. When a request finishes printing, the spooling s
Elimination of common sub expression during code optimization An optimizing transformation is a rule for rewriting a section of a program to enhance its execution efficiency wi
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