← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 312 · 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. The Back button is 32 px tall. How many px taller must it be?
  2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  5. 5.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) red on green
  6. 6.True or false: a clear word like Save is poor button design. (a) True (b) False
  7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Help button: 36 px tall
    Back button: 40 px tall
    Send button: 40 px tall
  10. 10.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) dark blue on white (d) black on pale grey
  11. 11.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) light grey on white (d) red on green
  12. 12.True or false: strong colour contrast is good button design. (a) False (b) True
  13. 13.True or false: a big, easy tap area is poor button design. (a) True (b) False
  14. 14.True or false: grey text on grey is poor button design. (a) False (b) True
  15. 15.True or false: space between buttons is good button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 56 px tall
    Next button: 32 px tall
    Save button: 40 px tall
  17. 17.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on pale grey (d) black on yellow
  18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.True or false: space between buttons is poor button design. (a) True (b) False
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 64 px tall
    Help button: 52 px tall     (a) Help (b) Cancel (c) Done
  21. 21.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Back button: 32 px tall
    Cancel button: 52 px tall
    Send button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Send button: 44 px tall
    Help button: 68 px tall
    Back button: 68 px tall     (a) Send (b) Help (c) Start (d) Back
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Start button: 56 px tall
    Save button: 64 px tall
    Cancel button: 64 px tall     (a) Start (b) Cancel (c) Send (d) Save
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 68 px tall
    Send button: 36 px tall
    Save button: 56 px tall     (a) Cancel (b) Send (c) Next (d) Save
  30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 36 px tall
    Done button: 40 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 44 px tall
    Start button: 68 px tall     (a) Done (b) Next (c) Start
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Back button: 44 px tall
    Help button: 32 px tall
    Next button: 60 px tall
  35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Help button: 52 px tall
    Save button: 64 px tall
    Send button: 28 px tall     (a) Next (b) Help (c) Save (d) Send
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Help button: 64 px tall
    Save button: 60 px tall     (a) Save (b) Help (c) Next
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 56 px tall
    Send button: 28 px tall     (a) Save (b) Help (c) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 40 px tall
    Start button: 32 px tall

Answer key

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

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