App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 132 · 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 easy to read? (a) pale pink on white (b) red on green (c) dark blue on black (d) white on dark green
2. 2.True or false: buttons almost touching is good button design. (a) True (b) False
3. 3.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) light grey on white (d) dark blue on white
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
5. 5.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
6. 6.True or false: buttons almost touching is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 68 px tall
   Send button: 64 px tall
   Back button: 60 px tall
   Cancel button: 44 px tall (a) Start (b) Back (c) Send (d) Cancel
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Start button: 48 px tall
    Send button: 56 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Help button: 64 px tall
    Save button: 56 px tall
    Done button: 56 px tall (a) Done (b) Help (c) Save (d) Next
15. 15.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 68 px tall
    Back button: 68 px tall
    Start button: 32 px tall (a) Start (b) Next (c) Save (d) Back
17. 17.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) white on black
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Start button: 60 px tall
    Cancel button: 72 px tall
    Done button: 64 px tall (a) Start (b) Back (c) Cancel (d) Done
20. 20.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
21. 21.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.True or false: grey text on grey is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 52 px tall
    Back button: 56 px tall
    Next button: 44 px tall
24. 24.True or false: space between buttons is poor button design. (a) True (b) False
25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Help button: 68 px tall
    Start button: 64 px tall (a) Start (b) Help (c) Send
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Save button: 36 px tall
    Start button: 48 px tall
    Back button: 48 px tall (a) Back (b) Start (c) Save (d) Next
32. 32.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) black on pale grey (d) yellow on white
33. 33.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) white on black (d) dark blue on black
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Next button: 64 px tall
    Save button: 72 px tall (a) Save (b) Next (c) Help
36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
37. 37.True or false: grey text on grey is poor button design. (a) True (b) False
38. 38.True or false: a tiny 20 px button is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Help button: 64 px tall
    Save button: 72 px tall
    Done button: 36 px tall (a) Start (b) Save (c) Done (d) Help
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Done button: 40 px tall
    Back button: 56 px tall
    Start button: 56 px tall

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