← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 345 · 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?
    Save button: 28 px tall
    Next button: 52 px tall
    Help button: 68 px tall     (a) Save (b) Help (c) Next
  2. 2.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) black on yellow (d) white on black
  3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 28 px tall
    Help button: 56 px tall     (a) Back (b) Send (c) Help
  5. 5.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  6. 6.True or false: a tiny 20 px button is good button design. (a) True (b) False
  7. 7.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  8. 8.Which colour pair is easy to read? (a) red on green (b) white on black (c) yellow on white (d) dark blue on black
  9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Start button: 28 px tall
    Back button: 64 px tall     (a) Start (b) Cancel (c) Back
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) yellow on white
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Help button: 48 px tall
    Next button: 52 px tall
    Done button: 64 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Send 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?
    Save button: 36 px tall
    Done button: 56 px tall
    Back button: 48 px tall     (a) Back (b) Save (c) Done
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 64 px tall
    Help button: 40 px tall
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 36 px tall
    Help button: 72 px tall
    Next button: 60 px tall     (a) Save (b) Help (c) Back (d) Next
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Back button: 48 px tall
    Done button: 24 px tall     (a) Send (b) Back (c) Done
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  21. 21.True or false: a big, easy tap area is poor button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 64 px tall
    Start button: 68 px tall
    Cancel button: 40 px tall     (a) Cancel (b) Start (c) Send (d) Help
  24. 24.True or false: strong colour contrast is poor button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Send button: 36 px tall
    Next button: 60 px tall
    Start button: 60 px tall     (a) Start (b) Next (c) Back (d) Send
  26. 26.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on dark green (d) white on black
  27. 27.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) light grey on white (d) dark blue on black
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Save button: 44 px tall
    Help button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Save button: 36 px tall
    Send button: 40 px tall
    Next button: 32 px tall
  30. 30.True or false: a clear word like Save is good button design. (a) False (b) True
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Back button: 64 px tall
    Save button: 52 px tall
    Done button: 48 px tall     (a) Save (b) Back (c) Done (d) Help
  32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Start button: 28 px tall
    Back button: 48 px tall
    Send button: 56 px tall     (a) Done (b) Back (c) Send (d) Start
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  35. 35.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) white on black (d) dark blue on white
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 72 px tall
    Cancel button: 24 px tall     (a) Cancel (b) Save (c) Start
  37. 37.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) yellow on white (d) white on dark green
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 52 px tall
    Help button: 44 px tall     (a) Send (b) Help (c) Back
  39. 39.True or false: icons with no meaning is poor 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?
    Next button: 36 px tall
    Back button: 56 px tall
    Save button: 64 px tall

Answer key

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

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