← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 327 · 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. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 40 px tall
    Done button: 32 px tall
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 40 px tall
    Send button: 36 px tall
    Back button: 32 px tall
  3. 3.True or false: space between buttons is poor button design. (a) True (b) False
  4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  5. 5.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Help button: 36 px tall
    Done button: 64 px tall
    Save button: 64 px tall     (a) Help (b) Back (c) Save (d) Done
  7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  8. 8.True or false: space between buttons is good button design. (a) False (b) True
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  10. 10.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) yellow on white (d) black on yellow
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Help button: 60 px tall
    Cancel button: 52 px tall
    Back button: 44 px tall     (a) Cancel (b) Help (c) Next (d) Back
  12. 12.True or false: a clear word like Save is poor button design. (a) True (b) False
  13. 13.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) black on pale grey
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  15. 15.True or false: a big, easy tap area is poor 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?
    Next button: 36 px tall
    Back button: 36 px tall
    Save button: 64 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Help button: 32 px tall
    Save button: 32 px tall
  18. 18.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) light grey on white (d) yellow on white
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 64 px tall
    Help button: 60 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall     (a) Back (b) Done (c) Cancel
  21. 21.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Done button: 48 px tall
    Back button: 48 px tall     (a) Back (b) Next (c) Done
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Send button: 52 px tall
    Back button: 28 px tall
    Start button: 48 px tall     (a) Send (b) Start (c) Back (d) Save
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Help button: 32 px tall
    Done button: 44 px tall
    Save button: 44 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Cancel button: 56 px tall
    Start button: 48 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Save button: 64 px tall
    Next button: 56 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Save (c) Done (d) Next
  27. 27.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  29. 29.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) white on black (d) red on green
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 44 px tall
    Send button: 68 px tall     (a) Help (b) Send (c) Save
  31. 31.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  35. 35.🔘 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: 60 px tall     (a) Help (b) Send (c) Back
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Cancel button: 44 px tall
    Save button: 40 px tall
  37. 37.True or false: a tiny 20 px button is good button design. (a) True (b) False
  38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?

Answer key

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

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