← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 93 · 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.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) red on green (d) white on black
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 32 px tall
    Cancel button: 48 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Help button: 24 px tall
    Cancel button: 64 px tall     (a) Back (b) Help (c) Cancel
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 56 px tall
    Save button: 36 px tall     (a) Done (b) Next (c) Save
  5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Next button: 60 px tall
    Save button: 28 px tall     (a) Next (b) Back (c) Save
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Done button: 64 px tall
    Send button: 52 px tall
    Help button: 72 px tall     (a) Send (b) Done (c) Cancel (d) Help
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Done button: 28 px tall
    Start button: 68 px tall     (a) Done (b) Start (c) Next
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Help button: 64 px tall
    Back button: 40 px tall
    Done button: 40 px tall
  10. 10.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) black on pale grey (d) pale pink on white
  11. 11.True or false: grey text on grey is good button design. (a) False (b) True
  12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 40 px tall
    Send button: 60 px tall
    Cancel button: 56 px tall     (a) Save (b) Cancel (c) Send (d) Next
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Next button: 52 px tall
    Back button: 60 px tall     (a) Next (b) Cancel (c) Back
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  16. 16.True or false: a clear word like Save is poor button design. (a) False (b) True
  17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  18. 18.True or false: strong colour contrast is poor button design. (a) True (b) False
  19. 19.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) white on black
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Help button: 40 px tall
    Next button: 48 px tall     (a) Help (b) Back (c) Next
  22. 22.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  23. 23.True or false: a big, easy tap area is poor button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 68 px tall
    Next button: 72 px tall     (a) Next (b) Cancel (c) Done
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 52 px tall
    Back button: 28 px tall
    Help button: 48 px tall     (a) Back (b) Cancel (c) Help (d) Next
  26. 26.True or false: a tiny 20 px button is good button design. (a) True (b) False
  27. 27.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) dark blue on white (d) white on black
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Save button: 48 px tall
    Start button: 48 px tall
    Cancel button: 68 px tall     (a) Back (b) Save (c) Cancel (d) Start
  29. 29.True or false: space between buttons is poor button design. (a) True (b) False
  30. 30.True or false: strong colour contrast is good button design. (a) False (b) True
  31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 36 px tall
    Save button: 36 px tall
    Done button: 48 px tall
  33. 33.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 28 px tall
    Start button: 48 px tall
    Help button: 52 px tall     (a) Save (b) Start (c) Help (d) Send
  35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 32 px tall
    Done button: 44 px tall
    Cancel button: 56 px tall
  37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Help button: 52 px tall
    Back button: 32 px tall
    Start button: 32 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 60 px tall
    Send button: 32 px tall
    Start button: 68 px tall     (a) Cancel (b) Back (c) Start (d) Send
  40. 40.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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