Robotics Worksheet: Debugging Robot Programs

Robotics lesson 26: Debugging robot programs · Set 636 · 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 triangle (3 equal sides), but it leaves a gap:
   repeat 2 { forward 10 cm; turn right 120° }
   What should the number 2 after “repeat” be?
2. 2.🐞 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) the floor is clean (d) wheels are too round
3. 3.🐞 This program should draw a regular square (4 equal sides), but the shape does not close:
   repeat 4 { forward 10 cm; turn right 60° }
   What should 60 be changed to?
4. 4.🐞 A mistake in a program is called a … (a) gear (b) sensor (c) loop (d) bug
5. 5.🐞 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, 8). Its program:
   1. forward 6
   2. turn right
   3. forward 2
   It stops at (6, 8) instead. Which line has the bug? (a) line 1 (b) line 2 (c) line 3
6. 6.🐞 This program should draw a regular triangle (3 equal sides), but the shape does not close:
   repeat 3 { forward 10 cm; turn right 60° }
   What should 60 be changed to?
7. 7.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
   repeat 6 { forward 10 cm; turn right 45° }
   What should the number 6 after “repeat” be?
8. 8.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
   repeat 7 { forward 10 cm; turn right 45° }
   What should the number 7 after “repeat” be?
9. 9.🔢 To debug a robot program, which is the FIRST step? (a) find the buggy line (b) spot what went wrong (c) fix one thing (d) run the program
10. 10.🐞 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 (2, 5). Its program:
    1. forward 3
    2. turn left
    3. forward 3
    It stops at (2, 4) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
11. 11.🐞 This program should draw a regular octagon (8 equal sides), but the shape does not close:
    repeat 8 { forward 10 cm; turn right 72° }
    What should 72 be changed to?
12. 12.🔢 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
13. 13.🐞 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?
14. 14.🔢 To debug a robot program, which comes first: “run the program” or “fix one thing”? (a) run the program (b) fix one thing
15. 15.🐞 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 (2, 7). Its program:
    1. forward 6
    2. turn right
    3. forward 2
    It stops at (6, 7) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
16. 16.🔢 To debug a robot program, which comes first: “run the program” or “test it again”? (a) test it again (b) run the program
17. 17.🐞 Why change only one thing at a time when debugging? (a) to save paper (b) to see what fixed it (c) to make it slower (d) to confuse others
18. 18.🐞 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 (8, 2). Its program:
    1. forward 2
    2. turn right
    3. forward 2
    It stops at (7, 2) instead. Which line has the bug? (a) line 2 (b) line 1 (c) line 3
19. 19.🐞 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 (6, 5). Its program:
    1. forward 3
    2. turn right
    3. forward 2
    It stops at (6, 4) instead. Which line has the bug? (a) line 3 (b) line 1 (c) line 2
20. 20.🐞 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 (8, 5). Its program:
    1. forward 5
    2. turn left
    3. forward 3
    It stops at (2, 5) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
21. 21.🐞 A robot starts at (5, 2) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (6, 8). Its program:
    1. forward 6
    2. turn right
    3. forward 2
    It stops at (7, 8) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
22. 22.🐞 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 (7, 4). Its program:
    1. forward 2
    2. turn right
    3. forward 4
    It stops at (8, 4) instead. Which line has the bug? (a) line 1 (b) line 2 (c) line 3
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 (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 3 (b) line 2 (c) line 1
24. 24.🔢 To debug a robot program, which comes first: “fix one thing” or “run the program”? (a) fix one thing (b) run the program
25. 25.🐞 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 (6, 3). Its program:
    1. forward 2
    2. turn right
    3. forward 2
    It stops at (6, 2) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
26. 26.🔢 To debug a robot program, what comes right after “find the buggy line”? (a) spot what went wrong (b) test it again (c) run the program (d) fix one thing
27. 27.🐞 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 (7, 6). Its program:
    1. forward 6
    2. turn left
    3. forward 3
    It stops at (1, 6) instead. Which line has the bug? (a) line 2 (b) line 1 (c) line 3
28. 28.🔢 To debug a robot program, which is the LAST step? (a) test it again (b) run the program (c) find the buggy line (d) spot what went wrong
29. 29.🐞 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 (1, 6). Its program:
    1. forward 5
    2. turn left
    3. forward 3
    It stops at (1, 7) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
30. 30.🐞 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 (3, 5). 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 2 (c) line 1
31. 31.🔢 To debug a robot program, which comes first: “run the program” or “find the buggy line”? (a) run the program (b) find the buggy line
32. 32.🐞 This program should draw a regular pentagon (5 equal sides), but the shape does not close:
    repeat 5 { forward 10 cm; turn right 45° }
    What should 45 be changed to?
33. 33.🐞 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 (2, 6). Its program:
    1. forward 4
    2. turn left
    3. forward 2
    It stops at (2, 5) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
34. 34.🐞 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, 3). Its program:
    1. forward 4
    2. turn right
    3. forward 1
    It stops at (5, 4) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
35. 35.🔢 To debug a robot program, what comes right after “spot what went wrong”? (a) test it again (b) find the buggy line (c) run the program (d) fix one thing
36. 36.🐞 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 (1, 3). Its program:
    1. forward 2
    2. turn right
    3. forward 3
    It stops at (7, 3) instead. Which line has the bug? (a) line 1 (b) line 2 (c) line 3
37. 37.🐞 This program should draw a regular pentagon (5 equal sides), but it leaves a gap:
    repeat 3 { forward 10 cm; turn right 72° }
    What should the number 3 after “repeat” be?
38. 38.🔢 To debug a robot program, which comes first: “find the buggy line” or “fix one thing”? (a) find the buggy line (b) fix one thing
39. 39.🐞 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?
40. 40.🐞 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 6
    2. turn right
    3. forward 3
    It stops at (8, 7) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1

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