App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 221 · 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.True or false: strong colour contrast is good button design. (a) True (b) False
2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 56 px tall
   Send button: 64 px tall
   Save button: 52 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 44 px tall
   Done button: 36 px tall
   Cancel button: 48 px tall
8. 8.True or false: a tiny 20 px button is poor button design. (a) True (b) False
9. 9.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on pale grey (d) white on dark green
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. The Cancel button is 24 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Done button: 48 px tall
    Cancel button: 56 px tall
    Back button: 40 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
17. 17.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Send button: 40 px tall
    Save button: 52 px tall
    Back button: 64 px tall
19. 19.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) yellow on white (d) dark blue on black
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.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
22. 22.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) white on dark green
25. 25.True or false: grey text on grey is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 28 px tall
    Help button: 72 px tall
    Save button: 52 px tall (a) Help (b) Next (c) Save (d) Done
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
28. 28.True or false: a tiny 20 px button is good button design. (a) False (b) True
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Done button: 40 px tall
    Help button: 52 px tall
    Save button: 52 px tall (a) Save (b) Help (c) Start (d) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
32. 32.True or false: a big, easy tap area is good button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Cancel button: 44 px tall
    Save button: 60 px tall
    Help button: 44 px tall
34. 34.🌗 Is white on black 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. Which button is too small?
    Save button: 24 px tall
    Next button: 52 px tall
    Cancel button: 68 px tall
    Back button: 60 px tall (a) Cancel (b) Back (c) Next (d) Save
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 68 px tall
    Done button: 68 px tall (a) Done (b) Help (c) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 56 px tall
    Send button: 36 px tall
39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Cancel button: 24 px tall
    Start button: 48 px tall
    Send button: 52 px tall (a) Back (b) Cancel (c) Start (d) Send

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