← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 642 · 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. Which button is too small?
    Help button: 28 px tall
    Next button: 60 px tall
    Back button: 56 px tall     (a) Help (b) Next (c) Back
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Save button: 40 px tall
    Done button: 68 px tall
    Send button: 56 px tall     (a) Save (b) Send (c) Done (d) Cancel
  3. 3.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) yellow on white (d) black on yellow
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 32 px tall
    Save button: 48 px tall
    Back button: 32 px tall
  6. 6.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on dark green (d) black on pale grey
  7. 7.True or false: space between buttons is poor button design. (a) False (b) True
  8. 8.True or false: strong colour contrast is poor button design. (a) True (b) False
  9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) pale pink on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Send button: 60 px tall
    Help button: 36 px tall
  12. 12.True or false: icons with no meaning is good button design. (a) True (b) False
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  14. 14.True or false: a clear word like Save is good button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Next button: 68 px tall
    Done button: 48 px tall
    Help button: 52 px tall     (a) Done (b) Back (c) Next (d) Help
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Done button: 48 px tall
    Help button: 72 px tall
    Back button: 36 px tall     (a) Help (b) Next (c) Back (d) Done
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) light grey on white
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Done button: 68 px tall
    Start button: 72 px tall     (a) Done (b) Start (c) Help
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Next button: 60 px tall
    Send button: 68 px tall
    Back button: 72 px tall     (a) Next (b) Back (c) Send (d) Cancel
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  26. 26.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) yellow on white (d) dark blue on black
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Help button: 64 px tall
    Back button: 40 px tall
    Cancel button: 48 px tall     (a) Send (b) Help (c) Back (d) Cancel
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Done button: 32 px tall
    Back button: 64 px tall
    Help button: 64 px tall     (a) Help (b) Back (c) Done (d) Cancel
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Cancel button: 32 px tall
    Back button: 56 px tall
    Start button: 52 px tall
  31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Start button: 56 px tall
    Send button: 56 px tall
    Next button: 40 px tall     (a) Back (b) Start (c) Next (d) Send
  33. 33.True or false: buttons almost touching is poor button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 36 px tall
    Send button: 52 px tall
    Start button: 72 px tall     (a) Start (b) Send (c) Next (d) Save
  35. 35.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.True or false: a tiny 20 px button is good button design. (a) True (b) False
  37. 37.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Help button: 36 px tall
    Send button: 36 px tall
    Save button: 52 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 32 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Save (c) Start
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Done button: 56 px tall
    Cancel button: 32 px tall
    Start button: 40 px tall

Answer key

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

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