A directory of Objective Type Questions covering all the Computer Science subjects. Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews.

31. The purpose of refreshing a CRT is ..........................
a. To avoid flickering
b. To maintain steady picture
c. To avoid fading of pixels
d. All of the above
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Answer: (a).To avoid flickering

32. The fly-back of electron beams from one scanline to next is known as ....................
a. Vertical Retrace
b. Horizontal Retrace
c. Raster scanning
d. Refreshing
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Answer: (b).Horizontal Retrace

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