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Computer Aptitude

OPERATING SYSTEM MCQs

Total Questions : 814 | Page 7 of 82 pages
Question 61. Following is/are operating system used in computers
  1.    MS-DOS
  2.    OS/2
  3.    UNIX
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d)
Question 62. Local replacement
  1.    allows a process to select a replacement frame from the set of all frames
  2.    requires that each process selects from only its own set of allocated frames
  3.    both (A) and (B) above
  4.    none of the above
 Discuss Question
Answer: Option B. -> requires that each process selects from only its own set of allocated frames
Answer: (b)
Question 63. In Responsive real time operating system
  1.    The interruption is acknowledge and operating system response to interrupt.
  2.    Once the operation starts no interrupt is acknowledge.
  3.    The operation completes in fixed inter of time.
  4.    None of these.
 Discuss Question
Answer: Option A. -> The interruption is acknowledge and operating system response to interrupt.
Answer: (a)
Question 64. UNIX recognizes following I/O devices
  1.    Disk and Tape drives
  2.    Terminals
  3.    Communication lines
  4.    All the above.
 Discuss Question
Answer: Option D. -> All the above.
Answer: (d)
Question 65. The total time to prepare a disk drive mechanism for a block of data to be read from it is
  1.    seek time
  2.    Latency
  3.    latency plus seek time
  4.    transmission time
 Discuss Question
Answer: Option C. -> latency plus seek time
Answer: (c)
Question 66. In two level scheme if each page is mapped by 4-byte (2
  1.    2 22 bytes
  2.    2 12 bytes
  3.    2 16 bytes
  4.    None of these.
 Discuss Question
Answer: Option A. -> 2 22 bytes
Answer: (a)
Question 67. An attached processor
  1.    is used one only a few computers
  2.    causes all processor to function equally
  3.    is more difficult to implement than a coprocessor
  4.    is used only for limited, specific functions
 Discuss Question
Answer: Option D. -> is used only for limited, specific functions
Answer: (d)
Question 68. Thrashing
  1.    reduces page I/O
  2.    decreases the degree of multiprogramming
  3.    implies excessive page I/O
  4.    improve the system performance
 Discuss Question
Answer: Option C. -> implies excessive page I/O
Answer: (c)
Question 69. External fragmentation solved by which allocation?
  1.    contiguous allocation
  2.    linked allocation
  3.    index allocation
  4.    both B and C
 Discuss Question
Answer: Option D. -> both B and C
Answer: (d)
Question 70. The portion of the process scheduler in an operating system that dispatches processes is concerned with
  1.    activating suspended I/O-bound processes
  2.    temporarily suspending processes when CPU load is too great
  3.    assigning ready processes to the CPU
  4.    all of the above
 Discuss Question
Answer: Option C. -> assigning ready processes to the CPU
Answer: (c)

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