Thursday, April 26, 2018

Computer Science Mock Test NET Exam (Operating Systems ) - Part 04

This Quiz is posted with the sole aim of guiding the aspirants of UGC-NET /CSIR -NET Exam to the path of success. To sharpen the edges of your own intelligence and practice, in a structured and concrete manner to ensure you definite Success in your endeavor and will Pave your way for a successful career in Teaching (or) Research Profession . All the very best...... Knock the door of success......
  1.  Which command will be used with vi editor to delete a single character?
    1.  z
    2.  h
    3.  x
    4.  W

  2. Which command is used to remove a file in Unix?
    1.  rf
    2.  r
    3.  mv
    4.  rm

  3. Single - user operaing system _________.
    1.  UNIX
    2.  MS-DOS
    3.  OS/2
    4.  ZENIX

  4. The principal of "locality of reference" justify the use of ______.
    1.  virtual memory
    2.  DMA
    3.  polling
    4.  cache memory

  5. The mv command changes
    1.  only the directory entry and i-node
    2.  only the i-node number
    3.  only the first-node number
    4.  only the directory entry

  6. The total to prepare a disk mechanism for a block of data to be read from it is _______.
    1.  delay time
    2.  latency pulse seek time
    3.  transmission time
    4.  seek time

  7. Which command is used to display the top of the file?
    1.  remove
    2.  cat
    3.  head
    4.  disp

  8. dev/null ________.
    1.  has write permission for all
    2.  is the UNIX built-in dustbin
    3.  is a file
    4.  All of the above

  9. Which  command is used in Unix to extract specific column from a file?
    1.  grep
    2.  extract
    3.  cut
    4.  cat

  10. Which column contains all details of the permissions of a file when one issue the Is-1 command?
    1.  fourth
    2.  first
    3.  second
    4.  zeroth