Archive for February 26, 2007

Question 26

When the multiplicity of jobs of A through E is 1 and the scheduling priority is based on shorted processing-time, what is the turnaround time of job B (in seconds)? Here, the overhead of OS can be ignored

                                           Unit: second

Job Arrival time Processing time required for single job execution
A 0 2
B 1 4
C 2 3
D 3 2
E 4 1

a) 8
b) 9
c) 10
d) 11

answer

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Question 25

The LRU scheme is adopted as the algorithm for page replacement in virtual memory management. When the order of page numbers to be referred to and updated is “2→ 3→ 5→ 8→ 2→ 3→ 6→ 2→ 3→ 5→ 1→ 6” and the size of the real memory page is 4 pages, how many page-outs occur due to page faults? Here,assume that no pages are loaded into the real memory in the initial state.

a) 3
b) 4
c) 5
d) 6

answer

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Question 24

In a paging system virtual memory, which of the following can be obtained from a page table ?

a) The size of main memory installed in the computer
b) The virtual addresses where the program is located
c) The time when the page is loaded into the main memory
d) The real address of the main memory are where the page is located

answer

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Question 23

An image was input from a 600-dpi scanner and output from a 200-dpi printer without changing the number of pixels. What is the correct area ratio between the input image and the printed image ?

a) 1:3
b) 1:9
c) 3:1
d) 9:1

answer

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Question 22

Which statement correctly explains the light emission system used for a PDP ( Plasma Display Panel )?

a) It utilizes light emission by gas discharge
b) Control dots on the screen use thin – film transistors
c) It uses organic compounds that emit light when a voltage is applied
d) Fire electronic beams from an electron gun are directed at phosphors to emit light.

answer

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Question 21

Which of the following correctly describes the standard for the PCI universal card ?

a) The card supports both the 5V and 3.3V buses
b) The card supports both 64-bit and 32-bit data widths
c) The card supports both 66 MHz and 33 MHz transfer speeds
d) The card supports both Low Profile PCI and standard PCI sizes

answer

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Question 20

Which of the following is the dedicated interface that allows high-speed transfer of large-volume image data ?

a) AGP
b) ATA
c) ISA
d) PCI

answer

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