← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 61 · 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: grey text on grey is good button design. (a) False (b) True
  2. 2.True or false: a clear word like Save is poor button design. (a) True (b) False
  3. 3.True or false: space between buttons is good button design. (a) False (b) True
  4. 4.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 24 px tall
    Next button: 48 px tall     (a) Help (b) Next (c) Start
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 64 px tall
    Send button: 48 px tall     (a) Cancel (b) Done (c) Send
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 44 px tall
    Back button: 56 px tall
    Done button: 40 px tall
  13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) black on pale grey (d) dark blue on white
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  16. 16.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) yellow on white (d) dark blue on black
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Cancel button: 48 px tall
    Help button: 36 px tall
    Save button: 52 px tall     (a) Save (b) Help (c) Send (d) Cancel
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Next button: 36 px tall
    Cancel button: 32 px tall
    Save button: 44 px tall
  22. 22.Which colour pair is hard to read? (a) red on green (b) white on black (c) black on yellow (d) white on dark green
  23. 23.True or false: strong colour contrast is poor button design. (a) True (b) False
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  25. 25.🌗 Is dark blue on black 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. The Done button is 44 px tall. How many px taller must it be?
  27. 27.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 40 px tall
    Start button: 44 px tall
    Done button: 40 px tall
  31. 31.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  32. 32.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  33. 33.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on black (d) black on yellow
  34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  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.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on pale grey (d) light grey on white
  37. 37.True or false: a tiny 20 px button is good button design. (a) False (b) True
  38. 38.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on yellow (d) black on pale grey
  39. 39.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?

Answer key

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

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