In the optimized technique for sequential access ___________ removes a page from the buffer as soon as the next page is requested.

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In the optimized technique for sequential access ___________ removes a page from the buffer as soon as the next page is requested.

1.write ahead

2.read ahead

3.free-behind

4.add-front

Posted Date:-2022-03-29 08:23:14

More MCQS Questions and answers

  1. A _________ directory is mounted over a directory of a _______ file system.
  2. A consistency checker _________ and tries to fix any inconsistencies it finds.
  3. A systems program such as fsck in ______ is a consistency checker.
  4. In UNIX, even an ’empty’ disk has a percentage of its space lost to ______
  5. The heads of the magnetic disk are attached to a _____ that moves all the heads as a unit.
  6. The set of tracks that are at one arm position make up a _____
  7. _____ tend to represent a major bottleneck in system performance.
  8. ______ mounts, is when a file system can be mounted over another file system, that is remotely mounted, not local.
  9. _______ in NFS involves the parsing of a path name into separate directory entries – or components.
  10. ________ writes occur in the order in which the disk subsystem receives them, and the writes are not buffered.
  11. A file being read or written sequentially should not have its pages replaced in LRU order, because _______
  12. A machine in Network file system (NFS) can be ________
  13. A mount operation includes the ______
  14. A process is moved to wait queue when I/O request is made with _______
  15. A server crash and recovery will __________ to a client.
  16. A single NFS write procedure _________
  17. All the changes that were done from a transaction that did not commit before the system crashed, have to be _____
  18. By preallocating the inodes and spreading them across the volume, we ___________ the system performance.
  19. Device drivers are implemented to interface ______
  20. Each set of operations for performing a specific task is a _____
  21. Every NFS request has a _________ allowing the server to determine if a request is duplicated or if any are missing.
  22. For every pair of component and directory vnode after path name translation ______
  23. I/O hardware contains ______
  24. In _______ information is recorded magnetically on platters.
  25. In ___________ writes, the data is stored in the cache.
  26. In the optimized technique for sequential access ___________ removes a page from the buffer as soon as the next page is requested.
  27. In UNIX, the file handle consists of a __________ and _____
  28. Once the changes are written to the log, they are considered to be ________
  29. Some directory information is kept in main memory or cache to ______
  30. The _________ becomes the name of the root of the newly mounted directory.
  31. The data-in register of I/O port is ______
  32. The device-status table contains ____
  33. The device-status table contains ________
  34. The host sets _____ bit when a command is available for the controller to execute.
  35. The mount mechanism ________ a transitive property.
  36. The mount request is mapped to the corresponding __________ and is forwarded to the mount server running on the specific server machine.
  37. The NFS protocol __________ concurrency control mechanisms.
  38. The NFS servers _______
  39. The server maintains a/an ________ that specifies local file systems that it exports for mounting, along with names of machines that are permitted to mount them.
  40. The server must write all NFS data ________
  41. The time taken for the desired sector to rotate to the disk head is called _______
  42. The time taken to move the disk arm to the desired cylinder is called the ______
  43. What is a circular buffer?
  44. When a client has a cascading mount _______ server(s) is/are involved in a path name traversal.
  45. When an entire committed transaction is completed, _______
  46. When hardware is accessed by reading and writing to the specific memory locations, then it is called ______
  47. Which buffer holds the output for a device?
  48. Which hardware triggers some operation after certain programmed count?
  49. Which one of the following connects high-speed high-bandwidth device to memory subsystem and CPU.
  50. With _______ a requested page and several subsequent pages are read and cached.
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