← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 293 · 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. Which button is too small?
    Next button: 72 px tall
    Cancel button: 36 px tall
    Back button: 56 px tall     (a) Next (b) Cancel (c) Back
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Cancel button: 64 px tall
    Save button: 36 px tall
    Send button: 32 px tall
  3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
  4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  7. 7.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.True or false: buttons almost touching is poor button design. (a) False (b) True
  9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Back button: 32 px tall
    Start button: 52 px tall
    Done button: 72 px tall     (a) Start (b) Send (c) Done (d) Back
  11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Help button: 52 px tall
    Cancel button: 48 px tall
    Save button: 60 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Cancel button: 52 px tall
    Send button: 48 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 72 px tall
    Next button: 36 px tall
    Save button: 64 px tall     (a) Cancel (b) Next (c) Help (d) Save
  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.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Back button: 72 px tall
    Cancel button: 72 px tall     (a) Cancel (b) Back (c) Save
  19. 19.True or false: strong colour contrast is good button design. (a) True (b) False
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Done button: 32 px tall
    Send button: 32 px tall
    Help button: 36 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Start button: 72 px tall
    Back button: 60 px tall     (a) Next (b) Back (c) Start
  22. 22.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) red on green (d) light grey on white
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Cancel button: 40 px tall
    Next button: 68 px tall     (a) Next (b) Cancel (c) Save
  24. 24.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  26. 26.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on yellow (d) white on black
  27. 27.True or false: a clear word like Save is good button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 36 px tall
    Save button: 60 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Send (c) Start (d) Save
  30. 30.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) light grey on white
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Done button: 44 px tall
    Send button: 48 px tall
    Next button: 60 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 60 px tall
    Next button: 36 px tall     (a) Cancel (b) Save (c) Next
  34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Help button: 56 px tall
    Back button: 68 px tall
    Done button: 52 px tall     (a) Help (b) Done (c) Back (d) Save
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 28 px tall
    Send button: 56 px tall     (a) Save (b) Send (c) Cancel
  38. 38.True or false: strong colour contrast is poor button design. (a) True (b) False
  39. 39.True or false: space between buttons is good button design. (a) False (b) True
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Help button: 48 px tall
    Next button: 48 px tall
    Cancel button: 44 px tall

Answer key

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

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