← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 653 · 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.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.True or false: space between buttons is poor button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 40 px tall
    Next button: 60 px tall
    Help button: 72 px tall     (a) Save (b) Help (c) Cancel (d) Next
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Done button: 64 px tall
    Save button: 64 px tall
    Back button: 32 px tall
  6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Done button: 28 px tall
    Save button: 56 px tall     (a) Cancel (b) Save (c) Done
  8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 60 px tall
    Start button: 32 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Done button: 44 px tall
    Next button: 40 px tall
    Cancel button: 36 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 52 px tall
    Send button: 48 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 40 px tall
    Done button: 64 px tall
    Start button: 48 px tall     (a) Send (b) Next (c) Start (d) Done
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 24 px tall
    Cancel button: 52 px tall
    Send button: 56 px tall     (a) Help (b) Cancel (c) Save (d) Send
  18. 18.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) white on black
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Help button: 52 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Help (c) Save
  20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Save button: 52 px tall
    Cancel button: 36 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  23. 23.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.True or false: a tiny 20 px button is good button design. (a) True (b) False
  25. 25.🌗 Is light grey on white 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. How many of these buttons follow the rule?
    Done button: 60 px tall
    Start button: 48 px tall
    Next button: 52 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Next button: 60 px tall
    Cancel button: 44 px tall
  28. 28.True or false: grey text on grey is poor button design. (a) True (b) False
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 56 px tall
    Back button: 48 px tall
    Help button: 36 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Save button: 68 px tall
    Next button: 64 px tall     (a) Next (b) Start (c) Save
  32. 32.True or false: icons with no meaning is good button design. (a) False (b) True
  33. 33.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  34. 34.True or false: a big, easy tap area is good button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  37. 37.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on white (d) dark blue on black
  38. 38.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) light grey on white (d) red on green
  39. 39.True or false: a big, easy tap area is poor button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 44 px tall
    Help button: 64 px tall

Answer key

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

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