← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 46 · 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. How many of these buttons follow the rule?
    Back button: 56 px tall
    Next button: 40 px tall
    Start button: 40 px tall
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  3. 3.True or false: a tiny 20 px button is good button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  5. 5.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on yellow (d) pale pink on white
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Help button: 72 px tall
    Start button: 64 px tall     (a) Back (b) Help (c) Start
  7. 7.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  9. 9.True or false: icons with no meaning is good button design. (a) False (b) True
  10. 10.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) pale pink on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Back button: 40 px tall
    Cancel button: 36 px tall
  12. 12.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on black (d) dark blue on white
  13. 13.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  14. 14.True or false: strong colour contrast is poor button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 40 px tall
    Help button: 52 px tall
    Done button: 60 px tall     (a) Next (b) Save (c) Help (d) Done
  17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  20. 20.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 72 px tall
    Back button: 28 px tall
    Start button: 72 px tall     (a) Start (b) Save (c) Next (d) Back
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Cancel button: 36 px tall
    Send button: 60 px tall
    Next button: 64 px tall     (a) Send (b) Help (c) Next (d) Cancel
  24. 24.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Cancel button: 64 px tall
    Start button: 52 px tall
    Save button: 48 px tall
  26. 26.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  28. 28.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) white on dark green
  29. 29.Which colour pair is easy to read? (a) dark blue on white (b) pale pink on white (c) light grey on white (d) dark blue on black
  30. 30.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 52 px tall
    Back button: 40 px tall
    Send button: 32 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Send button: 40 px tall
    Back button: 48 px tall
    Done button: 48 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 48 px tall
    Cancel button: 56 px tall
    Next button: 48 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 32 px tall
    Back button: 56 px tall
    Help button: 44 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  36. 36.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  37. 37.True or false: grey text on grey is poor button design. (a) False (b) True
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Help button: 48 px tall
    Cancel button: 64 px tall
    Send button: 44 px tall
  39. 39.True or false: a big, easy tap area is poor button design. (a) True (b) False
  40. 40.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on black (d) red on green

Answer key

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

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