Operating System Interview Question and Answers

36. What is a device queue?
  A list of processes waiting for a particular I/O device is called device queue.
37. What are the different types of Real-Time Scheduling?
  • Hard real-time systems required to complete a critical task within a guaranteed amount of time.
  • Soft real-time computing requires that critical processes receive priority over less fortunate ones.
38. What is starvation ?
  Starvation is a resourcemanagement problem where a process does not get the resources it needs for a long time because the resources are being allocated to other processes.
39. What is a long term scheduler & short term schedulers?
  • Long term schedulers are the job schedulers that select processes from the job queue and load them into memory for execution.
  • The Short term schedulers are the CPU schedulers that select a process form the ready queue and allocate the CPU to one of them.
40. What is fragmentation?
  Fragmentation occurs in a dynamic memory allocation system when many of the free blocks are too small to satisfy any request.
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