← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 542 · 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.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Save button: 24 px tall
    Start button: 72 px tall
    Help button: 48 px tall     (a) Back (b) Start (c) Help (d) Save
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 40 px tall
    Save button: 52 px tall
  4. 4.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) black on pale grey (d) light grey on white
  5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 32 px tall
    Done button: 52 px tall     (a) Done (b) Next (c) Cancel
  7. 7.True or false: a big, easy tap area is poor button design. (a) False (b) True
  8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on black (d) dark blue on black
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Next button: 56 px tall
    Done button: 24 px tall     (a) Cancel (b) Done (c) Next
  11. 11.True or false: icons with no meaning is poor button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Start button: 40 px tall
    Save button: 56 px tall
    Back button: 60 px tall
  13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 72 px tall
    Next button: 24 px tall     (a) Next (b) Done (c) Cancel
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 52 px tall
    Start button: 64 px tall
    Save button: 36 px tall
  16. 16.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) dark blue on white (d) white on dark green
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 44 px tall
    Next button: 36 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  20. 20.True or false: strong colour contrast is poor button design. (a) False (b) True
  21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 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: 40 px tall
    Done button: 48 px tall
    Save button: 60 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 28 px tall
    Send button: 60 px tall     (a) Cancel (b) Send (c) Help
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Back button: 36 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Back (c) Start
  26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 36 px tall
    Start button: 60 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 60 px tall
    Send button: 52 px tall
  29. 29.True or false: strong colour contrast is good button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Done button: 64 px tall
    Next button: 68 px tall
    Cancel button: 44 px tall     (a) Next (b) Cancel (c) Done (d) Help
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 64 px tall
    Help button: 40 px tall
    Back button: 32 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Next button: 40 px tall
    Cancel button: 64 px tall
  35. 35.True or false: a clear word like Save is good button design. (a) True (b) False
  36. 36.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on yellow (d) black on pale grey
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Save button: 60 px tall
    Send button: 52 px tall
    Done button: 72 px tall     (a) Send (b) Help (c) Save (d) Done
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 32 px tall
    Cancel button: 64 px tall
    Help button: 40 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design

Answer key

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

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