51. Which of the following command is used to switch between the window programs?
52. To prevent the addition and deletion of files on a disk or tape we use
53. During the boot process, the ..... looks for the system file
54. Which of the following resources must be protected by the operating system?
55. What are the two types of Semaphore?
56. Who is called a supervisor of computer activity?
57. Font folder is located on
58. From where do you change mouse setting?
59. Work group means
60. The core of operating system is:
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