App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 80 · 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.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) light grey on white
2. 2.True or false: a big, easy tap area is poor button design. (a) True (b) False
3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 32 px tall
   Done button: 72 px tall
   Start button: 72 px tall (a) Start (b) Save (c) Done
5. 5.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on pale grey (d) white on black
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 44 px tall
   Done button: 60 px tall
   Cancel button: 56 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Next button: 44 px tall
   Done button: 72 px tall
   Help button: 48 px tall (a) Cancel (b) Next (c) Help (d) Done
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 64 px tall
    Next button: 52 px tall
    Help button: 44 px tall (a) Next (b) Back (c) Help (d) Save
12. 12.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Start button: 72 px tall
    Save button: 56 px tall
    Done button: 36 px tall (a) Save (b) Help (c) Done (d) Start
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
15. 15.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Done button: 36 px tall
    Back 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 dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) dark blue on white (d) white on black
20. 20.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
22. 22.True or false: a tiny 20 px button is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Help button: 68 px tall
    Save button: 48 px tall
    Start button: 64 px tall (a) Start (b) Help (c) Save (d) Send
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Next button: 56 px tall
    Save button: 72 px tall
    Done button: 56 px tall (a) Cancel (b) Done (c) Save (d) Next
25. 25.True or false: a big, easy tap area is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
28. 28.True or false: buttons almost touching is poor button design. (a) False (b) True
29. 29.True or false: strong colour contrast is poor button design. (a) False (b) True
30. 30.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) pale pink on white (d) dark blue on white
31. 31.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
32. 32.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) light grey on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Next button: 52 px tall
    Back button: 24 px tall (a) Help (b) Back (c) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Next button: 64 px tall
    Back button: 56 px tall
    Done button: 36 px tall (a) Done (b) Next (c) Back (d) Send
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 52 px tall
    Back button: 52 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Done button: 48 px tall
    Save button: 44 px tall
40. 40.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design

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