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Question-1. What is PostScript?
Answer-1: PostScript is a page description language used for creating vector graphics and controlling printers.
Question-2. Who developed PostScript?
Answer-2: PostScript was developed by Adobe Systems in 1982.
Question-3. What are the key features of PostScript?
Answer-3: It supports scalable vector graphics, device independence, and a Turing-complete programming model.
Question-4. How is a PostScript file executed?
Answer-4: PostScript files are executed by a PostScript interpreter, typically in printers or viewer software.
Question-5. What is the basic syntax of PostScript?
Answer-5: PostScript uses a stack-based syntax, where operands are pushed onto a stack and operators act on them.
Question-6. What does showpage do in PostScript?
Answer-6: The showpage command tells the interpreter to print the current page and reset for the next.
Question-7. How are comments added in PostScript?
Answer-7: Comments start with %, e.g., % This is a comment.
Question-8. What is the role of the stack in PostScript?
Answer-8: The stack is used to store and manipulate data, including operands and intermediate results.
Question-9. How do you define a procedure in PostScript?
Answer-9: Use /name {commands} def, e.g., /square {dup mul} def.
Question-10. What is the moveto command?
Answer-10: moveto moves the current point to a specified location, e.g., 100 200 moveto.
Question-11. What does lineto do in PostScript?
Answer-11: lineto draws a straight line from the current point to the specified coordinates.
Question-12. How do you draw a rectangle in PostScript?
Answer-12: Use newpath x y moveto w 0 rlineto 0 h rlineto -w 0 rlineto closepath stroke.
Question-13. What does stroke do in PostScript?
Answer-13: stroke renders the path as a visible line.
Question-14. How do you fill a shape in PostScript?
Answer-14: Use fill, e.g., newpath 100 100 50 0 360 arc fill.
Question-15. What is the arc command in PostScript?
Answer-15: arc draws an arc of a circle, e.g., 100 100 50 0 180 arc.
Question-16. How do you set the color in PostScript?
Answer-16: Use setrgbcolor, e.g., 1 0 0 setrgbcolor for red.
Question-17. What is the purpose of gsave and grestore?
Answer-17: gsave saves the current graphics state, and grestore restores it.
Question-18. What is the scalefont command in PostScript?
Answer-18: scalefont scales a font to a specific size, e.g., 12 scalefont.
Question-19. How do you display text in PostScript?
Answer-19: Use show, e.g., /Helvetica findfont 12 scalefont setfont (Hello, World!) show.
Question-20. What does setlinewidth do in PostScript?
Answer-20: setlinewidth sets the thickness of lines, e.g., 2 setlinewidth.
Question-21. What is the translate command in PostScript?
Answer-21: translate shifts the coordinate system by a specified amount.
Question-22. How do you rotate objects in PostScript?
Answer-22: Use rotate, e.g., 45 rotate to rotate by 45 degrees.
Question-23. What is the scale command in PostScript?
Answer-23: scale scales the coordinate system, e.g., 2 2 scale doubles the size.
Question-24. How do you define a variable in PostScript?
Answer-24: Use /name value def, e.g., /x 100 def.
Question-25. What is the for loop syntax in PostScript?
Answer-25: start end increment {commands} for, e.g., 1 10 1 {dup mul =} for.
Question-26. How do you include a condition in PostScript?
Answer-26: Use if, e.g., x 10 gt { (Greater than 10) show } if.
Question-27. What is the array command in PostScript?
Answer-27: array creates an array, e.g., [1 2 3].
Question-28. How do you access elements of an array in PostScript?
Answer-28: Use get, e.g., [1 2 3] 1 get.
Question-29. What does dup do in PostScript?
Answer-29: dup duplicates the top item on the stack.
Question-30. How do you clear the stack in PostScript?
Answer-30: Use the clear command.
Question-31. What is the difference between fill and stroke?
Answer-31: fill fills the inside of a shape, while stroke renders its outline.
Question-32. What does clip do in PostScript?
Answer-32: clip sets the clipping path, restricting drawing to a specific area.
Question-33. How do you create a dashed line in PostScript?
Answer-33: Use setdash, e.g., [3 3] 0 setdash.
Question-34. What is the purpose of showpage?
Answer-34: showpage ends the current page and starts a new one.
Question-35. How do you include a comment in PostScript?
Answer-35: Start the line with %, e.g., % This is a comment.
Question-36. What is the currentpoint command in PostScript?
Answer-36: currentpoint retrieves the current position of the drawing cursor.
Question-37. How do you define a reusable function in PostScript?
Answer-37: Use /name {commands} def, e.g., /square {dup mul} def.
Question-38. How do you draw a circle in PostScript?
Answer-38: Use arc with newpath and stroke, e.g., newpath 100 100 50 0 360 arc stroke.
Question-39. What does eofill do in PostScript?
Answer-39: eofill fills a path using the even-odd rule.
Question-40. How do you create multiple pages in PostScript?
Answer-40: Use showpage for each page.
Question-41. What does translate do in PostScript?
Answer-41: translate shifts the coordinate system by specified x and y values.
Question-42. How do you embed images in PostScript?
Answer-42: Use image operators like image or imagemask.
Question-43. What is the purpose of def in PostScript?
Answer-43: def defines variables, functions, or constants.
Question-44. How do you draw a Bezier curve in PostScript?
Answer-44: Use curveto, e.g., x1 y1 x2 y2 x3 y3 curveto.
Question-45. What is the save command in PostScript?
Answer-45: save saves the current graphics state.
Question-46. How do you restore a saved graphics state in PostScript?
Answer-46: Use restore.
Question-47. What does stack do in PostScript?
Answer-47: stack displays the current contents of the stack.
Question-48. How do you scale text in PostScript?
Answer-48: Use scalefont with a font, e.g., /Helvetica findfont 12 scalefont setfont.
Question-49. What is the role of initgraphics in PostScript?
Answer-49: initgraphics resets the graphics state to defaults.
Question-50. How do you handle errors in PostScript?
Answer-50: Use error handling procedures defined in PostScript dictionaries, such as /errordict.
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