App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 405 · 40 questions

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.

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

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