Operating System Objective Question with Answers | Page-5

41 Spatial locality refers to the problem that once a location is referenced

42 Page fault occurs when

43 Determine the number of page faults when references to pages in the order - 1, 2, 4, 5, 2, 1, 2, 4. Assume that the main memory can accommodate 3 pages and the main memory already has the pages 1 and 2, with page 1 having been brought earlier than page 2, (Assume LRU algorithm is used)

44 Which of the following are real-time systems?

45 Necessary conditions for deadlock are

46 At a particular time, the value of a counting semaphore is 10. It will become 7 after

47 Mutual exclusion problem occurs

48 Which of the following.is a service not supported by the operating system?

49 A state is safe if the system can allocate resources to each process (up to its maximum) in some order and still avoid deadlock. Which of the following are true?

50 In which of the following scheduling policies does context switching never take place?