operating system | some best practice ouestion

OPERATING SYSTEM

1) Which of the following memory allocation scheme suffer from external fragmentation?

•  Segmentation 
•  swapping
•  Pure demand paging    
•  paging

  

          2)  Resources are allocated to process on non-shareable basis is?

•  Mutual exclusive      
•  hold & wait
•  Non preemption 
•  circular wait

        3) In round robin scheduling as time quantum is increased the average turnaround time?        

•    Increase    
•    Remains constant
•    Decrease      
•    varies irregular

       4) Pool based allocation of memory achieves better usage. Memory can be preempted from inactive         programs & used to accommodate active programs called?

•    Preemption         
•     swapping
•     Spooling   
•     scheduling

    5) What is the example of virtual resources?

•    Print service           
•    virtual machine
•    Virtual memory      
•     All of the above

    6) What of these is/are the desirable feature of OS?

•    Extensible
•    Portable
•    Reliable   
•    All of the above

   7) Which is not a term of describing the collection of operating programs?

•    Monitor         
•    kernel
•    Server           
•    supervisor

   8) Transparency is a feature of which type of OS?

• Batch processing OS  
• Time division 
• Distributed OS   
•  Multiprogramming OS

    9) Program priories, preemption are the key concept of which OS?

•  Batch processing OS
•  Time division OS
•  Distributed OS    
•  Multiprogramming OS

  10) If the disk head is located initially at 32 find number of disk moves required with FCFS if the disk queue of I/O blocks requested are 98,37,14,124,65,67?

•    239 
•    310
•    321 
•    325