← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 186 · 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. The Start button is 24 px tall. How many px taller must it be?
  2. 2.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on yellow (d) light grey on white
  3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.True or false: space between buttons is poor button design. (a) False (b) True
  7. 7.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  10. 10.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on white (d) dark blue on black
  11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Next button: 64 px tall
    Send button: 40 px tall     (a) Start (b) Next (c) Send
  13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
  15. 15.True or false: strong colour contrast is good button design. (a) False (b) True
  16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  18. 18.True or false: grey text on grey is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  20. 20.True or false: a big, easy tap area is poor button design. (a) True (b) False
  21. 21.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Cancel button: 60 px tall
    Next button: 48 px tall
    Done button: 56 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Help button: 48 px tall
    Done button: 52 px tall     (a) Done (b) Help (c) Start
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 56 px tall
    Back button: 56 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 44 px tall
    Cancel button: 52 px tall
    Send button: 64 px tall
  27. 27.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Save button: 60 px tall
    Next button: 48 px tall
    Done button: 52 px tall     (a) Done (b) Help (c) Next (d) Save
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Done button: 56 px tall
    Send button: 44 px tall     (a) Help (b) Send (c) Done
  31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 44 px tall
    Send button: 52 px tall
    Help button: 36 px tall
  34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  36. 36.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on dark green (d) pale pink on white
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Save button: 64 px tall
    Back button: 32 px tall
    Send button: 52 px tall
  38. 38.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) black on yellow (d) white on dark green
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 40 px tall
    Next button: 72 px tall
    Help button: 72 px tall     (a) Help (b) Send (c) Cancel (d) Next
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?

Answer key

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

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