Operating System Questions Answers - Chapter 1

• 22. The part of machine level instruction, which tells the central processor what has to be done, is

  1. Operation code
  2. Address
  3. Locator
  4. Flip-Flop

  Answer And Explanation

  Answer: Option A

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• 23. What is the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer user's productivity?

  1. Defined values
  2. Fixed values
  3. Default values
  4. None of the above

  Answer And Explanation

  Answer: Option C

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• 24. Multiprogramming systems

  1. Are easier to develop than single programming systems
  2. Execute each job faster
  3. Execute more jobs in the same time
  4. Are used only on large main frame computers

  Answer And Explanation

  Answer: Option C

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• 25. A thread is

  1. lightweight process where the context switching is low
  2. lightweight process where the context swithching is high
  3. used to speed up paging
  4. used in dead locks

  Answer And Explanation

  Answer: Option A

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• 26. The LRU algorithm

  1. pages out pages that have been used recently
  2. pages out pages that have not been used recently
  3. pages out pages that have been least used recently
  4. pages out the first page in a given area

  Answer And Explanation

  Answer: Option C

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• 27. Shortest Job First executes first the job

  1. with the least processor needs
  2. that first entered the queue
  3. that has been in the queue for the longest
  4. that last entered the queue

  Answer And Explanation

  Answer: Option A

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• 28. Operating system is

  1. A collection of hardware components
  2. A collection of input output devices
  3. A collection of software routines
  4. All of above

  Answer And Explanation

  Answer: Option C

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