This set of Computer Graphics Multiple Choice Questions & Answers (MCQs) focuses on “Curve, Text and Exterior Clipping – 2”.
1. Clipping in computer graphics is primarily used for which of the following function?
a) Zooming In a picture
b) Copying a picture
c) Removing objects and lines from a picture
d) Zooming out a picture
View Answer
Explanation: The process of clipping in computer graphics is primarily used for removing objects and lines from a picture. It is used to decide which part of the image is to be shown and which has to be discarded from the frame.
2. Which of the following is defined as a rectangular space in which the world definition of region is displayed?
a) Screen coordinate system
b) View window
c) World coordinate system
d) World window
View Answer
Explanation: View window is defined as a rectangular space in which the world definition of region is displayed. In the process of clipping anything that is completely inside the view window is saved, anything which is completely outside is discarded and if anything lies on the window’s boundary then it is clipped.
3. In which of the following text clipping method do we only include the characters of a string that are entirely inside the view window?
a) All or none string clipping
b) All or none character clipping
c) Text clipping
d) We don’t consider the character that are inside the view window
View Answer
Explanation: All or none character clipping is the process that is used to include only the characters of a string that are entirely inside the view window. It discards any character of a string that is either fully or partially outside the view window.
4. In which of the following text clipping method do we clip only a part of a characters of a string that is partially outside the view window?
a) All or none string clipping
b) All or none character clipping
c) Text clipping
d) We don’t clip the character that is partially inside the view window
View Answer
Explanation: In Text Clipping we consider only those characters that are fully inside the view window. If some portion of the character is outside the view window then we will remove those portion that is entirely outside the window and if any character is lying on the view pane boundary, then we will remove those portion that is outside the window boundary.
5. In exterior clipping which part of a picture is considered and saved?
a) Picture which is inside the view window
b) Picture which is on the edges of the view window
c) Picture which is outside the view window
d) We don’t consider the picture in exterior clipping
View Answer
Explanation: In the process of exterior clipping the picture which is outside the view window is considered and saved. The portion that is inside the view window is discarded. The exterior clipping process works opposite to the text clipping and curve clipping process.
6. Which of the following is not a use of exterior clipping?
a) It is used for displaying properly the pictures which overlap each other
b) It is used in the concept of overlapping windows
c) Used in designing and displaying of the number of maps and charts
d) It is used in clipping text inside the view window
View Answer
Explanation: Exterior Clipping is not used for clipping text inside the view window. Text Clipping is used for clipping anything related to text. Exterior Clipping is mainly used for displaying properly the pictures which overlap each other and for advertising and publishing purposes.
Sanfoundry Global Education & Learning Series – Computer Graphics.
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