← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 97 · 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.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Help button: 64 px tall
    Start button: 48 px tall     (a) Next (b) Help (c) Start
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Next button: 48 px tall
    Cancel button: 60 px tall
    Send button: 72 px tall     (a) Cancel (b) Start (c) Next (d) Send
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Back button: 68 px tall
    Next button: 60 px tall     (a) Back (b) Next (c) Cancel
  5. 5.True or false: space between buttons is poor button design. (a) False (b) True
  6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.True or false: icons with no meaning is poor button design. (a) False (b) True
  8. 8.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) red on green
  9. 9.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) pale pink on white (d) red on green
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  11. 11.True or false: a big, easy tap area is good button design. (a) False (b) True
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) pale pink on white (d) yellow on white
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 64 px tall
    Help button: 52 px tall
    Next button: 28 px tall     (a) Start (b) Next (c) Help (d) Send
  14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Back button: 44 px tall
    Cancel button: 48 px tall
    Done button: 56 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Cancel button: 64 px tall
    Next button: 52 px tall
    Start button: 36 px tall
  17. 17.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) black on pale grey (d) light grey on white
  19. 19.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  20. 20.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.True or false: a clear word like Save is poor button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 52 px tall
    Send button: 32 px tall
    Start button: 44 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Help button: 64 px tall
    Cancel button: 40 px tall     (a) Help (b) Next (c) Cancel
  24. 24.True or false: grey text on grey is good button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 64 px tall
    Cancel button: 56 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 60 px tall
    Save button: 36 px tall
    Send button: 64 px tall     (a) Save (b) Send (c) Help (d) Cancel
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  28. 28.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) yellow on white (d) white on dark green
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Help button: 32 px tall
    Done button: 48 px tall     (a) Next (b) Done (c) Help
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Done button: 68 px tall
    Cancel button: 56 px tall
    Save button: 52 px tall     (a) Cancel (b) Save (c) Done (d) Send
  31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 32 px tall
    Back button: 60 px tall     (a) Back (b) Save (c) Send
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 32 px tall
    Next button: 56 px tall     (a) Next (b) Cancel (c) Send
  36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 44 px tall
    Send button: 36 px tall
    Done button: 48 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?

Answer key

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

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