← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 354 · 40 questions
TalentJR

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

NameDateTime takenScore ___ / 40
  1. 1.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Send button: 64 px tall
    Next button: 36 px tall
    Cancel button: 48 px tall
  2. 2.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on pale grey (d) white on dark green
  3. 3.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 72 px tall
    Done button: 40 px tall
    Help button: 72 px tall     (a) Cancel (b) Save (c) Help (d) Done
  6. 6.True or false: strong colour contrast is good button design. (a) False (b) True
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 68 px tall
    Back button: 28 px tall
    Send button: 56 px tall     (a) Send (b) Back (c) Save (d) Help
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  9. 9.True or false: space between buttons is poor button design. (a) False (b) True
  10. 10.True or false: a tiny 20 px button is good button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Back button: 56 px tall
    Save button: 60 px tall
    Help button: 56 px tall     (a) Start (b) Save (c) Back (d) Help
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Send button: 52 px tall
    Done button: 32 px tall
    Cancel button: 56 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 52 px tall
    Cancel button: 44 px tall
  14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  16. 16.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) pale pink on white (d) yellow on white
  17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  18. 18.True or false: a clear word like Save is good button design. (a) False (b) True
  19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 48 px tall
    Next button: 52 px tall
    Back button: 44 px tall     (a) Back (b) Cancel (c) Help (d) Next
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  23. 23.True or false: space between buttons is good button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Start button: 28 px tall
    Save button: 72 px tall     (a) Start (b) Next (c) Save
  26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Start button: 48 px tall
    Cancel button: 56 px tall
    Next button: 48 px tall     (a) Cancel (b) Start (c) Next (d) Help
  28. 28.True or false: buttons almost touching is good button design. (a) True (b) False
  29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 52 px tall
    Back button: 60 px tall
    Help button: 56 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Save button: 36 px tall
    Next button: 48 px tall     (a) Done (b) Save (c) Next
  33. 33.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  34. 34.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Start button: 40 px tall
    Next button: 48 px tall
    Save button: 44 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Send button: 64 px tall
    Done button: 56 px tall
    Save button: 64 px tall     (a) Send (b) Save (c) Help (d) Done
  38. 38.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) yellow on white (d) red on green
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 44 px tall
    Cancel button: 68 px tall     (a) Cancel (b) Back (c) Save
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Cancel button: 72 px tall
    Next button: 60 px tall     (a) Next (b) Cancel (c) Save

Answer key

  1. 3
  2. dark blue on black
  3. easy to read
  4. good design
  5. Done
  6. True
  7. Back
  8. 12
  9. False
  10. False
  11. Start
  12. 3
  13. 2
  14. poor design
  15. good design
  16. black on yellow
  17. good design
  18. True
  19. poor design
  20. Back
  21. 12
  22. 20
  23. True
  24. 24
  25. Start
  26. good design
  27. Help
  28. False
  29. False
  30. 3
  31. 12
  32. Save
  33. easy to read
  34. poor design
  35. 28
  36. 2
  37. Help
  38. white on dark green
  39. Save
  40. Save

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students