What are the major limitations or contrary side effects of scan conversion?

Consider endpoints P1(0,0) and P2(4, 6). Calculate the points that made up the line P1P2 using DDA algorithm.

Rotate object about the line passing through (1, 3, 2) and (2, 4, 3) by the angle of 45°.

Find the normalization transformation that maps a window whose lower left corner is at (1,1) and upper right corner is at (3,5) onto a viewport that has lower left corner at (0,0) and upper right corner (1/2,1/2).

What is an image's aspect ratio? Is a simultaneous shearing the same as a shearing in one direction followed by a shearing in another direction? Why?

Scan conversion is essentially a systematic approach to mapping objects that are denned in continuous space to their discrete approximation. The various forms of distortion that result from this operation are collectively referred to as the aliasing effects of scan conversion.
Describe about Anti-aliasing effect.
 

Magnify the triangle with vertices A(0, 0), B(1, 1), and C(5,2) to twice its size while keeping C(5,2)fixed.