← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 100 · 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.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on pale grey (d) red on green
  2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  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.True or false: a big, easy tap area is poor button design. (a) True (b) False
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) dark blue on white (d) light grey on white
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Save button: 44 px tall
    Cancel button: 56 px tall
  8. 8.True or false: buttons almost touching is good button design. (a) False (b) True
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 64 px tall
    Help button: 44 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Done button: 44 px tall
    Help button: 40 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 64 px tall
    Send button: 60 px tall
    Cancel button: 24 px tall     (a) Next (b) Back (c) Cancel (d) Send
  12. 12.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Help button: 48 px tall
    Start button: 56 px tall
    Cancel button: 24 px tall     (a) Start (b) Send (c) Cancel (d) Help
  16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  17. 17.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) black on yellow
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  19. 19.True or false: space between buttons is good button design. (a) False (b) True
  20. 20.🔘 Is this good or poor button design: grey text on grey? (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?
    Next button: 64 px tall
    Done button: 52 px tall
    Save button: 56 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Save button: 32 px tall
    Help button: 60 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Send button: 48 px tall
    Back button: 68 px tall     (a) Send (b) Help (c) Back
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Send button: 56 px tall
    Back button: 48 px tall
    Save button: 60 px tall     (a) Next (b) Back (c) Save (d) Send
  27. 27.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 32 px tall
    Next button: 36 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 72 px tall
    Back button: 40 px tall     (a) Back (b) Save (c) Cancel
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 48 px tall
    Start button: 52 px tall
    Send button: 36 px tall
  31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Back button: 36 px tall
    Next button: 64 px tall
    Save button: 36 px tall
  33. 33.True or false: buttons almost touching is poor button design. (a) False (b) True
  34. 34.True or false: a tiny 20 px button is good button design. (a) False (b) True
  35. 35.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) yellow on white (d) dark blue on black
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Send button: 44 px tall
    Save button: 44 px tall
    Done button: 48 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Start button: 72 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Start (c) Back
  39. 39.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 72 px tall
    Save button: 28 px tall
    Back button: 60 px tall     (a) Cancel (b) Back (c) Help (d) Save

Answer key

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

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