App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 280 · 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.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
3. 3.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) yellow on white
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
6. 6.True or false: a clear word like Save is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
8. 8.True or false: icons with no meaning is good button design. (a) True (b) False
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 52 px tall
    Start button: 40 px tall
    Help button: 56 px tall (a) Cancel (b) Save (c) Help (d) Start
12. 12.True or false: icons with no meaning is poor button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Help button: 56 px tall
    Send button: 44 px tall
    Save button: 56 px tall
14. 14.True or false: grey text on grey is poor button design. (a) True (b) False
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
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.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) pale pink on white (d) yellow on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 68 px tall
    Save button: 24 px tall (a) Save (b) Next (c) Cancel
20. 20.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Done button: 48 px tall
    Start button: 68 px tall (a) Done (b) Save (c) Start
22. 22.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
23. 23.True or false: buttons almost touching is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Back button: 56 px tall
    Next button: 64 px tall
    Save button: 52 px tall (a) Help (b) Back (c) Save (d) Next
25. 25.True or false: space between buttons is good button design. (a) True (b) False
26. 26.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) dark blue on black (d) light grey on white
27. 27.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) dark blue on white (d) black on yellow
28. 28.True or false: buttons almost touching is good button design. (a) False (b) True
29. 29.True or false: strong colour contrast is good button design. (a) True (b) False
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 32 px tall
    Done button: 32 px tall
    Next button: 48 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 56 px tall
    Start button: 40 px tall (a) Send (b) Back (c) Start
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 36 px tall
    Start button: 56 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
35. 35.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
37. 37.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) pale pink on white (d) white on dark green
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Save button: 44 px tall
    Cancel button: 48 px tall (a) Done (b) Cancel (c) Save
39. 39.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) dark blue on black
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?

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