Archive for February 19, 2007

Question 20

To display a 256 color data on a 1024-by-768-dot resolution CRT display unit, how many kilobytes of video memory are required? Assume that 1 kilobyte indicates 1,024 bytes.

a) 96
b) 768
c) 2,304
d) 24,576

answer

Advertisements

Comments (2)

Question 19

Which the combination of the terms below is most appropriate for the following descriptions (1) through (3) of input/output control ?

(1) Data is transferred between the main memory unit and the input/output unit via registers of the processor.
(2) Data is transferred between the main memory unit and the input/output unit directly via special hardware dedicated for data transfer connected in most cases to the system bus, bypassing the processor.
(3) This is a type of method (2) With this method, hardware especially dedicated for input/output operations autonomously reads programs for data transfer controls from the main memory, and controls the input/output units, enabling an increase in the degree of parallel processing.

  (1) (2) (3)
a) Pipeline control method DMA control method Channel control method
b) Pipeline control method Channel control method DMA control method
c) Program control method DMA control method Channel control method
d) Program control method Channel control method DMA control method

answer

Leave a Comment

Question 18

Which of the following is a correct statement for a CD-ROM?

a) Although writing is not possible, there are devices with access speeds faster than those of hard disk drives. Therefore, it is suited for databases that require random accessing without addition or updating of data.
b) Each piece of data is managed with an address consisting of three levels, namely cylinder, track and sector.
c) ISO 9660, an international specification for the logical file format for CD-ROM, does not allow directory information to be kept. Therefore, the hierarchical structure is managed with long file names that include symbols such as “/” and “\”.
d) Its contents can include digital data recorded in sectors. such as data and programs for processing them, and audio information similar to what is contained in music CDs.

answer

Leave a Comment

Question 17

Which of the following is a correct description of RAID compared with conventional hard disk drives ?

a) Data transfer speeds of individual hard disk drives are increased.
b) Capacities far larger than the total of those of individual hard disk drives are achieved.
c) Data access time becomes longer because many hard disk drives must be accessed.
d) With two or more hard disk drives used in parallel, are increase in performance and reliability of the disk system is expected.

answer

Leave a Comment

Question 16

When an MPU accesses the main memory via cache memory, the effective access time is 15 nanoseconds. What is the hit radio assuming that the time to access the main memory is 60 nanoseconds and the time to access the cache memory is 10 nanoseconds?

a) 0.1
d) 0.17
c) 0.38
d) 0.9

answer

Leave a Comment

Question 15

A computer is provided with the processing capacity of 2 MIPS and 5000 instructions are required as overhead for a page replacement. What is the maximum number of page replacements which can be executed per second to make the amount of the overhead 5% or less of the overall processing capacity?

a) 2
b) 5
c) 20
d) 380

answer

Comments (1)

Question 14

Which of the following indicates the correct order for executing an instruction on a computer?

a) Fetching the operand → Decoding the instruction → Fetching the instruction → Executing the instruction
b) Fetching the operand → Fetching the instruction → Decoding the instruction → Executing the instruction
c) Decoding the instruction → Fetching the instruction → Fetching the operand → Executing the instruction
d) Fetching the instruction → Decoding the instruction → Fetching the operand → Executing the instruction

answer

Leave a Comment

Older Posts »