Robotics Worksheet: Debugging Robot Programs

Robotics lesson 26: Debugging robot programs · Set 214 · 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.🐞 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, 7). Its program:
   1. forward 7
   2. turn left
   3. forward 3
   It stops at (2, 8) instead. Which line has the bug? (a) line 2 (b) line 1 (c) line 3
2. 2.🐞 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?
3. 3.🐞 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?
4. 4.🔢 To debug a robot program, which is the LAST step? (a) run the program (b) find the buggy line (c) test it again (d) spot what went wrong
5. 5.🐞 This program should draw a regular triangle (3 equal sides), but the shape does not close:
   repeat 3 { forward 10 cm; turn right 90° }
   What should 90 be changed to?
6. 6.🐞 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?
7. 7.🐞 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 (3, 6). Its program:
   1. forward 6
   2. turn right
   3. forward 2
   It stops at (7, 6) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
8. 8.🐞 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, 5). Its program:
   1. forward 3
   2. turn left
   3. forward 3
   It stops at (1, 5) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
9. 9.🐞 A mistake in a program is called a … (a) sensor (b) loop (c) gear (d) bug
10. 10.🔢 To debug a robot program, which is the FIRST step? (a) test it again (b) spot what went wrong (c) run the program (d) fix one thing
11. 11.🐞 This program should draw a regular square (4 equal sides), but it leaves a gap:
    repeat 3 { forward 10 cm; turn right 90° }
    What should the number 3 after “repeat” be?
12. 12.🐞 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, 3). Its program:
    1. forward 2
    2. turn right
    3. forward 4
    It stops at (9, 3) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
13. 13.🐞 A robot turns the wrong way at every corner. What is the likely bug? (a) left and right mixed up (b) battery is too new (c) the floor is clean (d) wheels are too round
14. 14.🐞 This program should draw a regular square (4 equal sides), but the shape does not close:
    repeat 4 { forward 10 cm; turn right 45° }
    What should 45 be changed to?
15. 15.🐞 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, 3). Its program:
    1. forward 3
    2. turn right
    3. forward 1
    It stops at (5, 3) instead. Which line has the bug? (a) line 2 (b) line 1 (c) line 3
16. 16.🐞 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 (2, 4). Its program:
    1. forward 2
    2. turn left
    3. forward 2
    It stops at (3, 4) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
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 (6, 2). Its program:
    1. forward 2
    2. turn right
    3. forward 3
    It stops at (7, 2) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
18. 18.🐞 This program should draw a regular hexagon (6 equal sides), but it leaves a gap:
    repeat 5 { forward 10 cm; turn right 60° }
    What should the number 5 after “repeat” be?
19. 19.🐞 This program should draw a regular octagon (8 equal sides), but the shape does not close:
    repeat 8 { forward 10 cm; turn right 60° }
    What should 60 be changed to?
20. 20.🔢 To debug a robot program, which comes first: “spot what went wrong” or “find the buggy line”? (a) find the buggy line (b) spot what went wrong
21. 21.🔢 To debug a robot program, what comes right after “fix one thing”? (a) find the buggy line (b) spot what went wrong (c) test it again (d) run the program
22. 22.🐞 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 (6, 7). Its program:
    1. forward 5
    2. turn right
    3. forward 1
    It stops at (6, 6) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
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, 2). Its program:
    1. forward 2
    2. turn left
    3. forward 3
    It stops at (1, 2) instead. Which line has the bug? (a) line 3 (b) line 1 (c) line 2
24. 24.🐞 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, 3). Its program:
    1. forward 3
    2. turn left
    3. forward 3
    It stops at (2, 3) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
25. 25.🐞 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 (3, 5). Its program:
    1. forward 5
    2. turn left
    3. forward 2
    It stops at (3, 6) instead. Which line has the bug? (a) line 2 (b) line 3 (c) line 1
26. 26.🐞 Why change only one thing at a time when debugging? (a) to make it slower (b) to see what fixed it (c) to confuse others (d) to save paper
27. 27.🐞 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, 3). Its program:
    1. forward 2
    2. turn left
    3. forward 3
    It stops at (2, 3) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2
28. 28.🐞 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?
29. 29.🐞 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?
30. 30.🔢 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
31. 31.🔢 To debug a robot program, what comes right after “spot what went wrong”? (a) run the program (b) find the buggy line (c) fix one thing (d) test it again
32. 32.🐞 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 (7, 4). Its program:
    1. forward 3
    2. turn right
    3. forward 1
    It stops at (6, 4) instead. Which line has the bug? (a) line 3 (b) line 1 (c) line 2
33. 33.🐞 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?
34. 34.🔢 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
35. 35.🔢 To debug a robot program, what comes right after “run the program”? (a) fix one thing (b) find the buggy line (c) spot what went wrong (d) test it again
36. 36.🐞 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?
37. 37.🔢 To debug a robot program, which comes first: “fix one thing” or “run the program”? (a) fix one thing (b) run the program
38. 38.🐞 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 (8, 5). Its program:
    1. forward 3
    2. turn right
    3. forward 2
    It stops at (7, 5) instead. Which line has the bug? (a) line 1 (b) line 2 (c) line 3
39. 39.🐞 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, 6). Its program:
    1. forward 5
    2. turn right
    3. forward 3
    It stops at (7, 6) instead. Which line has the bug? (a) line 3 (b) line 2 (c) line 1
40. 40.🐞 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, 4). Its program:
    1. forward 3
    2. turn left
    3. forward 3
    It stops at (2, 3) instead. Which line has the bug? (a) line 1 (b) line 3 (c) line 2

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