← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 198 · 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?
    Help button: 64 px tall
    Next button: 68 px tall
    Send button: 64 px tall
    Back button: 28 px tall     (a) Help (b) Next (c) Send (d) Back
  2. 2.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) dark blue on white (d) white on black
  3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Send button: 64 px tall
    Start button: 36 px tall
    Done button: 52 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Done button: 48 px tall
    Send button: 56 px tall
    Save button: 68 px tall     (a) Done (b) Save (c) Help (d) Send
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Start button: 64 px tall
    Help button: 52 px tall
    Save button: 48 px tall     (a) Start (b) Save (c) Help (d) Done
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 60 px tall
    Done button: 24 px tall
    Cancel button: 72 px tall     (a) Done (b) Cancel (c) Help (d) Save
  9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Help button: 60 px tall
    Next button: 28 px tall
    Back button: 64 px tall     (a) Next (b) Help (c) Start (d) Back
  11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Save button: 60 px tall
    Done button: 52 px tall     (a) Done (b) Save (c) Start
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Done button: 68 px tall
    Save button: 56 px tall     (a) Done (b) Save (c) Start
  14. 14.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 24 px tall
    Start button: 60 px tall     (a) Back (b) Next (c) Start
  17. 17.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) red on green
  18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Send button: 52 px tall
    Save button: 44 px tall
    Done button: 44 px tall
  20. 20.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on dark green (d) light grey on white
  21. 21.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on yellow (d) black on pale grey
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Help button: 64 px tall
    Done button: 52 px tall
  23. 23.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) red on green (d) white on black
  24. 24.True or false: space between buttons is poor button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Next button: 40 px tall
    Help button: 64 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 32 px tall
    Next button: 64 px tall
    Back button: 60 px tall
  28. 28.True or false: buttons almost touching is poor button design. (a) True (b) False
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Next button: 32 px tall
    Start button: 32 px tall
    Done button: 64 px tall
  30. 30.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) black on yellow (d) dark blue on white
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Next button: 60 px tall
    Done button: 56 px tall     (a) Next (b) Done (c) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 28 px tall
    Back button: 52 px tall     (a) Save (b) Back (c) Help
  33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  34. 34.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on yellow (d) light grey on white
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Next button: 32 px tall
    Cancel button: 52 px tall     (a) Help (b) Cancel (c) Next
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Send button: 64 px tall
    Start button: 72 px tall     (a) Start (b) Save (c) Send
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Done button: 36 px tall
    Save button: 36 px tall
    Start button: 48 px tall

Answer key

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

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