← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 185 · 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. The Help button is 32 px tall. How many px taller must it be?
  2. 2.True or false: grey text on grey is poor button design. (a) False (b) True
  3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  4. 4.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 72 px tall
    Send button: 48 px tall     (a) Send (b) Done (c) Cancel
  6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 28 px tall
    Back button: 60 px tall
    Cancel button: 48 px tall     (a) Cancel (b) Back (c) Next (d) Save
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Save button: 52 px tall
    Cancel button: 40 px tall
    Back button: 60 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Save button: 28 px tall
    Next button: 72 px tall     (a) Next (b) Save (c) Done
  13. 13.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) black on pale grey (d) dark blue on white
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Cancel button: 36 px tall
    Start button: 64 px tall
  15. 15.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Done button: 56 px tall
    Send button: 44 px tall
    Help button: 32 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Back button: 36 px tall
    Save button: 60 px tall
    Start button: 52 px tall     (a) Save (b) Back (c) Done (d) Start
  18. 18.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on white (d) dark blue on black
  19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Start button: 32 px tall
    Save button: 60 px tall
    Cancel button: 68 px tall     (a) Save (b) Next (c) Start (d) Cancel
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  22. 22.True or false: strong colour contrast is good button design. (a) False (b) True
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 56 px tall
    Next button: 44 px tall
    Send button: 60 px tall     (a) Cancel (b) Next (c) Send (d) Save
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 40 px tall
    Cancel button: 56 px tall
  25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Help button: 56 px tall
    Next button: 48 px tall     (a) Help (b) Next (c) Back
  27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.True or false: buttons almost touching is poor button design. (a) False (b) True
  29. 29.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on yellow (d) dark blue on black
  30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 44 px tall
    Send button: 64 px tall
  32. 32.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 32 px tall
    Cancel button: 52 px tall     (a) Back (b) Send (c) Cancel
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Help button: 56 px tall
    Send button: 68 px tall     (a) Send (b) Cancel (c) Help
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  36. 36.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) light grey on white (d) black on yellow
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Cancel button: 56 px tall
    Done button: 40 px tall     (a) Done (b) Next (c) Cancel
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Next button: 56 px tall
    Send button: 48 px tall
    Back button: 32 px tall
  40. 40.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design

Answer key

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

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