← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 528 · 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 poor button design. (a) True (b) False
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Done button: 56 px tall
    Cancel button: 64 px tall     (a) Done (b) Cancel (c) Back
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Start button: 44 px tall
    Help button: 52 px tall
    Save button: 56 px tall
  4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 36 px tall
    Save button: 56 px tall
  8. 8.True or false: strong colour contrast is good button design. (a) True (b) False
  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.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on white (d) dark blue on black
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Back button: 32 px tall
    Next button: 48 px tall     (a) Back (b) Next (c) Cancel
  12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 64 px tall
    Next button: 52 px tall
    Start button: 64 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 56 px tall
    Done button: 48 px tall
  16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  17. 17.True or false: a big, easy tap area is good button design. (a) True (b) False
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  19. 19.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.True or false: strong colour contrast is poor button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  22. 22.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  23. 23.True or false: a clear word like Save is poor button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Next button: 32 px tall
    Done button: 60 px tall
    Start button: 44 px tall
  25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Start button: 32 px tall
    Help button: 40 px tall
    Send button: 64 px tall
  27. 27.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) yellow on white (d) black on pale grey
  28. 28.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  30. 30.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  32. 32.True or false: a clear word like Save is good button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Back button: 48 px tall
    Cancel button: 32 px tall
    Help button: 60 px tall     (a) Save (b) Back (c) Help (d) Cancel
  34. 34.True or false: a big, easy tap area is poor button design. (a) False (b) True
  35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Next button: 56 px tall
    Start button: 64 px tall     (a) Start (b) Send (c) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Send button: 24 px tall
    Next button: 60 px tall     (a) Send (b) Save (c) Next
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  39. 39.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) white on dark green
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?

Answer key

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

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