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    • ( 21 ) With _______, a requested page and several subsequent pages are read and cached.

    • 1) write ahead
    • 2) read ahead
    • 3) free-behind
    • 4) add-front
    • Discussion in forum
      Answer : 2) read ahead
      Solution : with read ahead, a requested page and several subsequent pages are read and cached.








      discussion


      Answer : 2) read ahead

    • ( 22 ) Which amongst the following is a valid page replacement policy?

    • 1) RU policy (Recurrently used)
    • 2) LRU policy (Least Recently Used)
    • 3) both 1 and 2
    • 4) None of these
    • Discussion in forum
      Answer : 2) LRU policy (Least Recently Used)
      Solution : LRU is page replacement policy.








      discussion


      Answer : 2) LRU policy (Least Recently Used)

    • ( 23 ) What is the duration of a time quantum in Round-Robin Scheduling?

    • 1) 10-100 millisec
    • 2) 10-100 nanosec
    • 3) 100-1000 millisec
    • 4) 100-1000 nanosec
    • Discussion in forum
      Answer : 1) 10-100 millisec
      Solution : The duration of a time quantum in Round-Robin Scheduling is 10-100 millisec.








      discussion


      Answer : 1) 10-100 millisec

    • ( 24 ) Anonymous access allows a user to transfer files :

    • 1) without having an account on the remote system
    • 2) only if he accesses the system with a guest account
    • 3) only if he has an account on the remote system
    • 4) None of these
    • Discussion in forum
      Answer : 1) without having an account on the remote system
      Solution : The world wide web uses anonymous file exchange almost exclusively.








      discussion


      Answer : 1) without having an account on the remote system

    • ( 25 ) In process scheduling,___________determines which ready process will be executed next by processor.

    • 1) long term scheduling
    • 2) medium term scheduling
    • 3) short term scheduling
    • 4) none of the above
    • Discussion in forum
      Answer : 3) short term scheduling
      Solution : In process scheduling, short term scheduling determines which ready process will be executed next by processor.








      discussion


      Answer : 3) short term scheduling

    • ( 26 ) Programs tend to make memory accesses that are in proximity of previous access this is called

    • 1) spatial locality
    • 2) temporal locality
    • 3) reference locality
    • 4) access locality
    • Discussion in forum
      Answer : 1) spatial locality
      Solution : Programs tend to make memory accesses that are in proximity of previous access this is called spatial locality.








      discussion


      Answer : 1) spatial locality

    • ( 27 ) Applications like Banking and reservations require which type of OS?

    • 1) Real Time
    • 2) Hard Real Time
    • 3) Soft Real Time
    • 4) None of the above
    • Discussion in forum
      Answer : 3) Soft Real Time
      Solution : Soft Real Time os is require in Banking and reservations.








      discussion


      Answer : 3) Soft Real Time

    • ( 28 ) With____________A page is written out to secondary memory only when it has been selected for replacement.

    • 1) pre-cleaning
    • 2) demand cleaning
    • 3) required cleaning
    • 4) fast cleaning
    • Discussion in forum
      Answer : 2) demand cleaning
      Solution : With demand cleaning, a page is written out to secondary memory only when it has been selected for replacement.








      discussion


      Answer : 2) demand cleaning

    • ( 29 ) The NFS servers :

    • 1) are stateless
    • 2) save the current state of the request
    • 3) maybe stateless
    • 4) None of these
    • Discussion in forum
      Answer : 1) are stateless
      Solution : The NFS servers are stateless.








      discussion


      Answer : 1) are stateless

    • ( 30 ) The open file table has a/an _______ associated with each file.

    • 1) file content
    • 2) file permission
    • 3) open count
    • 4) close count
    • Discussion in forum
      Answer : 3) open count
      Solution : The open file table has a/an open count associated with each file.








      discussion


      Answer : 3) open count





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