Robotics Worksheet: Debugging Robot Programs

Robotics lesson 26: Debugging robot programs · Set 904 · 40 questions

Robot tip (Compare and fix one thing): Run it, spot what went wrong, find the buggy line, fix one thing, test again. Wrong side → a turn is the wrong way. Too far or too short → a forward number is wrong. A shape that does not close → the turn should be 360 ÷ sides; a gap → the repeat number should equal the sides.

1. 1.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
   repeat 5 { forward 10 cm; turn right 45° }
   What should the number 5 after “repeat” be?
2. 2.🐞 A mistake in a program is called a … (a) bug (b) sensor (c) gear (d) loop
3. 3.🐞 This program should draw a regular triangle (3 equal sides), but the shape does not close:
   repeat 3 { forward 10 cm; turn right 45° }
   What should 45 be changed to?
4. 4.🐞 This program should draw a regular pentagon (5 equal sides), but the shape does not close:
   repeat 5 { forward 10 cm; turn right 90° }
   What should 90 be changed to?
5. 5.🔢 To debug a robot program, which is the FIRST step? (a) spot what went wrong (b) run the program (c) test it again (d) find the buggy line
6. 6.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
   repeat 6 { forward 10 cm; turn right 120° }
   What should 120 be changed to?
7. 7.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
   repeat 4 { forward 10 cm; turn right 45° }
   What should the number 4 after “repeat” be?
8. 8.🔢 To debug a robot program, which is the LAST step? (a) find the buggy line (b) test it again (c) run the program (d) fix one thing
9. 9.🐞 A robot turns the wrong way at every corner. What is the likely bug? (a) battery is too new (b) left and right mixed up (c) wheels are too round (d) the floor is clean
10. 10.🐞 A robot starts at (5, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (2, 2). Its program:
    1. forward 2
    2. turn right
    3. forward 3
    It stops at (8, 2) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
11. 11.🔢 To debug a robot program, which comes first: “find the buggy line” or “spot what went wrong”? (a) spot what went wrong (b) find the buggy line
12. 12.🔢 To debug a robot program, which comes first: “fix one thing” or “find the buggy line”? (a) find the buggy line (b) fix one thing
13. 13.🔢 To debug a robot program, which comes first: “test it again” or “fix one thing”? (a) fix one thing (b) test it again
14. 14.🔢 To debug a robot program, which comes first: “spot what went wrong” or “run the program”? (a) run the program (b) spot what went wrong
15. 15.🐞 This program should draw a regular triangle (3 equal sides), but the shape does not close:
    repeat 3 { forward 10 cm; turn right 72° }
    What should 72 be changed to?
16. 16.🔢 To debug a robot program, which comes first: “find the buggy line” or “run the program”? (a) run the program (b) find the buggy line
17. 17.🐞 A robot starts at (4, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 4). Its program:
    1. forward 4
    2. turn left
    3. forward 1
    It stops at (3, 4) instead. Which line has the bug? (a) line 3 (b) line 1 (c) line 2
18. 18.🐞 This program should draw a regular square (4 equal sides), but it leaves a gap:
    repeat 2 { forward 10 cm; turn right 90° }
    What should the number 2 after “repeat” be?
19. 19.🐞 This program should draw a regular pentagon (5 equal sides), but it leaves a gap:
    repeat 4 { forward 10 cm; turn right 72° }
    What should the number 4 after “repeat” be?
20. 20.🔢 To debug a robot program, which comes first: “fix one thing” or “spot what went wrong”? (a) spot what went wrong (b) fix one thing
21. 21.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 72° }
    What should 72 be changed to?
22. 22.🐞 This program should draw a regular pentagon (5 equal sides), but it leaves a gap:
    repeat 2 { forward 10 cm; turn right 72° }
    What should the number 2 after “repeat” be?
23. 23.🐞 A robot starts at (4, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (2, 4). Its program:
    1. forward 4
    2. turn right
    3. forward 2
    It stops at (6, 4) instead. Which line has the bug? (a) line 2 (b) line 1 (c) line 3
24. 24.🔢 To debug a robot program, which comes first: “find the buggy line” or “fix one thing”? (a) fix one thing (b) find the buggy line
25. 25.🐞 This program should draw a regular square (4 equal sides), but the shape does not close:
    repeat 4 { forward 10 cm; turn right 120° }
    What should 120 be changed to?
26. 26.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
    repeat 2 { forward 10 cm; turn right 45° }
    What should the number 2 after “repeat” be?
27. 27.🐞 A robot starts at (4, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 5). Its program:
    1. forward 3
    2. turn right
    3. forward 1
    It stops at (5, 4) instead. Which line has the bug? (a) line 2 (b) line 1 (c) line 3
28. 28.🔢 To debug a robot program, which comes first: “spot what went wrong” or “test it again”? (a) test it again (b) spot what went wrong
29. 29.🐞 A robot starts at (5, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (4, 6). Its program:
    1. forward 5
    2. turn left
    3. forward 1
    It stops at (4, 5) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
30. 30.🔢 To debug a robot program, which comes first: “find the buggy line” or “test it again”? (a) find the buggy line (b) test it again
31. 31.🐞 A robot starts at (4, 2) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 8). Its program:
    1. forward 5
    2. turn right
    3. forward 1
    It stops at (5, 7) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
32. 32.🐞 A robot starts at (4, 2) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 4). Its program:
    1. forward 3
    2. turn right
    3. forward 1
    It stops at (5, 5) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
33. 33.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 45° }
    What should 45 be changed to?
34. 34.🐞 Why change only one thing at a time when debugging? (a) to confuse others (b) to see what fixed it (c) to save paper (d) to make it slower
35. 35.🐞 This program should draw a regular octagon (8 equal sides), but the shape does not close:
    repeat 8 { forward 10 cm; turn right 120° }
    What should 120 be changed to?
36. 36.🔢 To debug a robot program, what comes right after “fix one thing”? (a) run the program (b) spot what went wrong (c) find the buggy line (d) test it again
37. 37.🐞 A robot starts at (5, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (8, 6). Its program:
    1. forward 5
    2. turn right
    3. forward 4
    It stops at (9, 6) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
38. 38.🔢 To debug a robot program, which comes first: “run the program” or “spot what went wrong”? (a) run the program (b) spot what went wrong
39. 39.🐞 A robot starts at (4, 2) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (2, 5). Its program:
    1. forward 4
    2. turn left
    3. forward 2
    It stops at (2, 6) instead. Which line has the bug? (a) line 3 (b) line 1 (c) line 2
40. 40.🐞 A robot starts at (4, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 4). Its program:
    1. forward 4
    2. turn right
    3. forward 2
    It stops at (6, 4) instead. Which line has the bug? (a) line 1 (b) line 2 (c) line 3

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