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Most accurate global time is based on oscillations of the ______________

A. Cesium-130 atom

B. Cesium-133 atom

C. Cesium-136 atom

D. Cesium-139 atom

Correct Answer : B.


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  1. When copying more than one file at a time, you must specify an existing directory as the ___________
  2. The essential difference between an operating system like Linux and one like Windows is that
  3. Which command is used to display the contents of the text file of DOS?
  4. Which one of the following statements is true?
  5. A SCSI device can transfer up to----------- of information per second.
  6. In the case of____________ , changes to an open file are only locally visible.
  7. Which of the following does not occur during the power-on-self-test (POST)?
  8. When a peripheral device needs immediate attention from the operating system, it generates a(n)
  9. ______________ selects a process from among the ready processes to execute on the CPU.
  10. An orphan process is automatically inherited by the _____and becomes a _______ of this process.
  11. ____________approach can place the data directly into the memory or take the data directly from the…
  12. When resources have multiple instances ________ is used for deadlock Avoidance.
  13. Which of the following operating system reads and reacts in actual time?
  14. Process migration involves__________________
  15. Choose the correct statement from the following.
  16. Transparent RPC mechanism refers to :
  17. A process may create a new process by executing ___________system call.
  18. What do you mean by 0-reliable level in multicast communication?
  19. In_________________ model, when a process does a release access, the contents of all the modifications…
  20. In ________________________ each node periodically sends a message to the time server.
  21. The primary purpose of an operating system is:
  22. Ext2 is the standard file system of _______ and uses a block size of_____bytes
  23. Initialization of I/O devices is part of the_________.
  24. What is dispatch latency?
  25. The Bankers algorithm is used
  26. The name services of DCE include ________
  27. ______________ is a situation in which two computer programs sharing the same resource are effectively…
  28. The usual su command syntax is
  29. When you start up the computer the boot up storage at which the BIOS versions manufacturer and data…
  30. The operating system is the most common type of ___ Software