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UGC NET CSE | June 2012 | Part 3 | Question: 63

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If a and b are the end points of a line, then which of the following is true?

  1. If both end points are left, right, above or below the window, the line is invisible.
  2. If both end points are left, right, above or below the window, the line is completely visible.
  3. If both end points are left, right, above or below the window, the line is trivially visible
  4. If both end points are left, right, above or below the window, the line is trivially invisible
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if both end points of a line is at either one end i.e ( both are left,right,above and below )then clearly they are not visible or invisible (so choice B, C are out ) now since nothing has to be done to them neither clipping nor reatining so we ignore them  completely or they are trivial for us hence the line is trivially invisible

so ans is D
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