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Robotics Worksheet: Debugging Robot Programs

Robotics lesson 26: Debugging robot programs · Set 30 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🐞 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?
  2. 2.🐞 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?
  3. 3.🐞 Why change only one thing at a time when debugging? (a) to make it slower (b) to save paper (c) to confuse others (d) to see what fixed it
  4. 4.🔢 To debug a robot program, which is the FIRST step? (a) spot what went wrong (b) run the program (c) find the buggy line (d) fix one thing
  5. 5.🔢 To debug a robot program, which is the LAST step? (a) fix one thing (b) find the buggy line (c) test it again (d) run the program
  6. 6.🐞 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, 5). Its program:
    1. forward 4
    2. turn left
    3. forward 2
    It stops at (2, 5) instead. Which line has the bug?     (a) line 3 (b) line 1 (c) line 2
  7. 7.🐞 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?
  8. 8.🐞 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 (6, 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 3 (c) line 1
  9. 9.🐞 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, 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 1 (b) line 3 (c) line 2
  10. 10.🐞 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?
  11. 11.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 90° }
    What should 90 be changed to?
  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 left
    3. forward 3
    It stops at (2, 3) instead. Which line has the bug?     (a) line 1 (b) line 3 (c) line 2
  13. 13.🔢 To debug a robot program, what comes right after “find the buggy line”? (a) run the program (b) fix one thing (c) spot what went wrong (d) test it again
  14. 14.🔢 To debug a robot program, what comes right after “spot what went wrong”? (a) run the program (b) fix one thing (c) test it again (d) find the buggy line
  15. 15.🐞 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 (4, 3). Its program:
    1. forward 2
    2. turn right
    3. forward 1
    It stops at (6, 3) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1
  16. 16.🐞 A mistake in a program is called a … (a) gear (b) sensor (c) bug (d) loop
  17. 17.🐞 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 (7, 3). Its program:
    1. forward 3
    2. turn left
    3. forward 2
    It stops at (3, 3) instead. Which line has the bug?     (a) line 1 (b) line 3 (c) line 2
  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 (3, 3). Its program:
    1. forward 2
    2. turn left
    3. forward 2
    It stops at (3, 2) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1
  19. 19.🔢 To debug a robot program, which comes first: “test it again” or “fix one thing”? (a) fix one thing (b) test it again
  20. 20.🐞 A robot turns the wrong way at every corner. What is the likely bug? (a) wheels are too round (b) the floor is clean (c) left and right mixed up (d) battery is too new
  21. 21.🐞 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, 3). Its program:
    1. forward 3
    2. turn left
    3. forward 4
    It stops at (1, 3) instead. Which line has the bug?     (a) line 1 (b) line 3 (c) line 2
  22. 22.🔢 To debug a robot program, which comes first: “fix one thing” or “find the buggy line”? (a) fix one thing (b) find the buggy line
  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 (7, 4). Its program:
    1. forward 5
    2. turn right
    3. forward 3
    It stops at (7, 5) instead. Which line has the bug?     (a) line 2 (b) line 3 (c) line 1
  24. 24.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
    repeat 3 { forward 10 cm; turn right 45° }
    What should the number 3 after “repeat” be?
  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 72° }
    What should 72 be changed to?
  26. 26.🐞 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?
  27. 27.🐞 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 (4, 5). Its program:
    1. forward 3
    2. turn left
    3. forward 2
    It stops at (3, 5) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  28. 28.🐞 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?
  29. 29.🐞 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?
  30. 30.🐞 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?
  31. 31.🔢 To debug a robot program, which comes first: “spot what went wrong” or “fix one thing”? (a) fix one thing (b) spot what went wrong
  32. 32.🐞 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 (3, 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 1 (b) line 3 (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.🐞 This program should draw a regular hexagon (6 equal sides), but it leaves a gap:
    repeat 3 { forward 10 cm; turn right 60° }
    What should the number 3 after “repeat” be?
  35. 35.🐞 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?
  36. 36.🐞 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 3
    2. turn right
    3. forward 2
    It stops at (6, 3) instead. Which line has the bug?     (a) line 1 (b) line 3 (c) line 2
  37. 37.🔢 To debug a robot program, which comes first: “find the buggy line” or “spot what went wrong”? (a) find the buggy line (b) spot what went wrong
  38. 38.🐞 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 (6, 5). Its program:
    1. forward 5
    2. turn left
    3. forward 1
    It stops at (4, 5) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1
  39. 39.🐞 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, 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 3 (b) line 1 (c) line 2
  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 (6, 5). Its program:
    1. forward 4
    2. turn right
    3. forward 2
    It stops at (7, 5) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1

Answer key

  1. 45
  2. 3
  3. to see what fixed it
  4. run the program
  5. test it again
  6. line 3
  7. 60
  8. line 3
  9. line 2
  10. 60
  11. 60
  12. line 2
  13. fix one thing
  14. find the buggy line
  15. line 2
  16. bug
  17. line 2
  18. line 1
  19. fix one thing
  20. left and right mixed up
  21. line 3
  22. find the buggy line
  23. line 1
  24. 8
  25. 90
  26. 120
  27. line 3
  28. 5
  29. 45
  30. 90
  31. spot what went wrong
  32. line 2
  33. 8
  34. 6
  35. 4
  36. line 3
  37. spot what went wrong
  38. line 2
  39. line 3
  40. line 3

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