← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 205 · 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.True or false: strong colour contrast is good button design. (a) True (b) False
  2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  3. 3.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.True or false: space between buttons is poor button design. (a) True (b) False
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 60 px tall
    Save button: 72 px tall     (a) Cancel (b) Save (c) Done
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  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.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Cancel button: 68 px tall
    Done button: 60 px tall     (a) Done (b) Help (c) Cancel
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Help button: 60 px tall
    Next button: 64 px tall
  13. 13.True or false: a big, easy tap area is poor button design. (a) True (b) False
  14. 14.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) yellow on white (d) dark blue on black
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  16. 16.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Send button: 24 px tall
    Cancel button: 52 px tall     (a) Send (b) Cancel (c) Help
  18. 18.True or false: space between buttons is good button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Next button: 64 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall     (a) Send (b) Cancel (c) Save (d) Next
  20. 20.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on pale grey (d) dark blue on white
  21. 21.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) light grey on white (d) yellow on white
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  23. 23.True or false: a big, easy tap area is good button design. (a) False (b) True
  24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  25. 25.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 36 px tall
    Back button: 40 px tall
  27. 27.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  29. 29.True or false: buttons almost touching is good button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  33. 33.True or false: grey text on grey is good button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  35. 35.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 52 px tall
    Save button: 40 px tall     (a) Done (b) Save (c) Back
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Done button: 48 px tall
    Back button: 32 px tall
    Cancel button: 56 px tall
  39. 39.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) white on dark green (d) white on black
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Save button: 32 px tall
    Send button: 36 px tall

Answer key

  1. True
  2. poor design
  3. easy to read
  4. easy to read
  5. False
  6. Cancel
  7. 8
  8. 12
  9. good design
  10. 20
  11. Help
  12. 2
  13. False
  14. dark blue on white
  15. 8
  16. hard to read
  17. Send
  18. True
  19. Send
  20. red on green
  21. white on dark green
  22. 20
  23. True
  24. good design
  25. poor design
  26. 0
  27. hard to read
  28. True
  29. False
  30. 16
  31. 16
  32. good design
  33. False
  34. 12
  35. hard to read
  36. hard to read
  37. Save
  38. 2
  39. dark blue on black
  40. 1

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