ANSWERS TO SELF TEST ON CHAPTER 3
1. A pixel is the smallest area of light that can be displayed on the screen.
2. There are 256 pixel positions across the low resolution mode.
3. There are 256 pixel positions from top to bottom in the low resolution mode.
4. An address is determined by.
the up value, 0 to 100
the across value, 0 to a number computed by the system
5. There are eight colours available in the low resolution mode including black and white.
6.
1. LINE draws a line, e.g. LINE a,b TO x,y
2. INK selects a colour for drawing, e.g. INK 5
3. PAPER selects a background colour e.g. PAPER 7
4. BORDER draws a border, e.g. BORDER 1,5
7. REPeat name....END REPeat name.
8. A REPeat loop terminates when an 'EXIT name' statement is executed.
9. Loops in SuperBASIC have names so that it is possible to EXIT from them in a straightforward
way. It is not necessary to work out line numbers in advance.
CHECK YOUR SCORE
11 to 13 is very good. Carry on reading.
8 to 10 is good but re-read some parts of chapter three.
6 or 7 is fair but re-read some parts of chapter three and do the test again.
Under 6. You should work carefully through chapter three again and repeat the test.
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