Operating System MCQ - Virtual Memory

This section focuses on "Virtual Memory" in Operating System. These Multiple Choice Questions (MCQ) should be practiced to improve the Operating System skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.

1. A computer can address more memory than the amount physically installed on the system. This extra memory is actually called ______________.

A. Virtual Memory
B. Physical Memory
C. Logical Memory
D. Secondary Memory

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2. MMU stands for?

A. memory mapping unit
B. memory management unit
C. main memory unit
D. None of the above

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3. While executing a program, if the program references a page which is not available in the main memory then it is known as?

A. Demand Paging
B. Frame Fault
C. page fault
D. processor fault

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4. Which of the following are the advantage of Demand Paging?

A. Large virtual memory.
B. More efficient use of memory.
C. There is no limit on degree of multiprogramming.
D. All of the above

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5. The string of memory references is ?

A. Page Replacement
B. Reference String
C. Memory References
D. Page References

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6. consider the following sequence of addresses : 123,215,600,1234,76,96. If page size is 100, then the reference string is?

A. 1,2,6,12
B. 12,21,60,123,7,9
C. 1,2,6,12,0,0
D. 0,2,6,12,0,0

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7. Which algorithm is based on the argument that the page with the smallest count?

A. Least frequently Used
B. Page Buffering algorithm
C. Most frequently Used
D. Least Recently Used

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8. Swap space exists in ____________

A. Primary Memory
B. secondary memory
C. virtual memory

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9. In FIFO, ______ in main memory is the one which will be selected for replacement.

A. oldest page
B. newest page
C. random page
D. None of the above

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10. A process is thrashing if ____________

A. it is spending more time paging than executing
B. it is spending less time paging than executing
C. page fault occurs
D. swapping can not take place

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