a. Explain the following: (3 Marks) i. Computer graphics ii. Scan code iii. Refreshing of the screen b. Differentiate between random scan and raster scan displays. (2 Marks) c. Explain the merits and demerits of penetration techniques. (4 Marks) d. Explain the following: i. Initgraph ( ); ii. Delay ( ); e. Differentiate between emissive and non-emissive displays. (2 Marks) f. Explain the following terms: (4 Marks) i. Persistence ii. Resolution iii. Aspect ratio iv. Addressability
g. Differentiate between impact and non-impact printers. (2 Marks) h. Explain the following: i. Line ii. Circle iii. Ellipse iv. Polygon i. Explain the methods used for smoothly joining two line segments. (2 Marks) j. Define transformation and explain the following: (3 Marks) k. Explain various representation schemes used in three dimensional objects. (2 Marks)

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