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Robotics Worksheet: Debugging Robot Programs

Robotics lesson 26: Debugging robot programs · Set 21 · 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.🐞 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, 4). Its program:
    1. forward 4
    2. turn left
    3. forward 1
    It stops at (4, 4) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  2. 2.🔢 To debug a robot program, which comes first: “test it again” or “run the program”? (a) test it again (b) run the program
  3. 3.🔢 To debug a robot program, which is the LAST step? (a) find the buggy line (b) test it again (c) spot what went wrong (d) fix one thing
  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.🐞 A robot turns the wrong way at every corner. What is the likely bug? (a) the floor is clean (b) battery is too new (c) wheels are too round (d) left and right mixed up
  6. 6.🐞 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?
  7. 7.🐞 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, 6). Its program:
    1. forward 5
    2. turn left
    3. forward 2
    It stops at (2, 5) instead. Which line has the bug?     (a) line 1 (b) line 2 (c) line 3
  8. 8.🐞 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?
  9. 9.🐞 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?
  10. 10.🐞 A mistake in a program is called a … (a) bug (b) gear (c) sensor (d) loop
  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 60° }
    What should 60 be changed to?
  12. 12.🐞 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 (1, 6). Its program:
    1. forward 6
    2. turn right
    3. forward 3
    It stops at (7, 6) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  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 60° }
    What should 60 be changed to?
  14. 14.🐞 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, 5). Its program:
    1. forward 3
    2. turn left
    3. forward 1
    It stops at (4, 5) instead. Which line has the bug?     (a) line 2 (b) line 3 (c) line 1
  15. 15.🐞 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?
  16. 16.🐞 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?
  17. 17.🔢 To debug a robot program, which comes first: “run the program” or “test it again”? (a) run the program (b) test it again
  18. 18.🐞 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 7
    2. turn left
    3. forward 2
    It stops at (3, 9) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  19. 19.🔢 To debug a robot program, what comes right after “spot what went wrong”? (a) fix one thing (b) find the buggy line (c) test it again (d) run the program
  20. 20.🐞 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 (3, 4). Its program:
    1. forward 2
    2. turn left
    3. forward 2
    It stops at (2, 4) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1
  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 (6, 3). Its program:
    1. forward 3
    2. turn left
    3. forward 1
    It stops at (4, 3) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  22. 22.🐞 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, 8). Its program:
    1. forward 6
    2. turn right
    3. forward 3
    It stops at (8, 8) 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 (5, 5). Its program:
    1. forward 5
    2. turn right
    3. forward 2
    It stops at (6, 5) instead. Which line has the bug?     (a) line 3 (b) line 1 (c) line 2
  24. 24.🐞 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?
  25. 25.🐞 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?
  26. 26.🐞 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?
  27. 27.🐞 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?
  28. 28.🐞 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 left
    3. forward 3
    It stops at (1, 8) instead. Which line has the bug?     (a) line 2 (b) line 3 (c) line 1
  29. 29.🔢 To debug a robot program, which comes first: “find the buggy line” or “test it again”? (a) test it again (b) find the buggy line
  30. 30.🔢 To debug a robot program, which comes first: “fix one thing” or “run the program”? (a) fix one thing (b) run the program
  31. 31.🐞 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?
  32. 32.🐞 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?
  33. 33.🔢 To debug a robot program, which is the FIRST step? (a) fix one thing (b) spot what went wrong (c) run the program (d) find the buggy line
  34. 34.🐞 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?
  35. 35.🐞 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?
  36. 36.🐞 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?
  37. 37.🔢 To debug a robot program, which comes first: “run the program” or “fix one thing”? (a) fix one thing (b) run the program
  38. 38.🐞 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, 6). Its program:
    1. forward 6
    2. turn left
    3. forward 2
    It stops at (2, 6) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  39. 39.🐞 Why change only one thing at a time when debugging? (a) to confuse others (b) to see what fixed it (c) to make it slower (d) to save paper
  40. 40.🐞 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?

Answer key

  1. line 2
  2. run the program
  3. test it again
  4. 72
  5. left and right mixed up
  6. 8
  7. line 1
  8. 45
  9. 5
  10. bug
  11. 45
  12. line 2
  13. 120
  14. line 2
  15. 90
  16. 120
  17. run the program
  18. line 1
  19. find the buggy line
  20. line 3
  21. line 2
  22. line 2
  23. line 3
  24. 120
  25. 120
  26. 90
  27. 90
  28. line 3
  29. find the buggy line
  30. run the program
  31. 45
  32. 6
  33. run the program
  34. 8
  35. 8
  36. 90
  37. run the program
  38. line 3
  39. to see what fixed it
  40. 60

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