App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 503 · 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 this good or poor button design: strong colour contrast? (a) poor design (b) good design
2. 2.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
4. 4.True or false: a tiny 20 px button is good button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 56 px tall
   Send button: 48 px tall
   Save button: 28 px tall (a) Next (b) Save (c) Send
6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
8. 8.True or false: a big, easy tap area is good button design. (a) True (b) False
9. 9.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on white (d) red on green
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 40 px tall
    Help button: 52 px tall
12. 12.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) light grey on white (d) white on dark green
13. 13.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) white on black (d) black on yellow
14. 14.True or false: buttons almost touching is poor button design. (a) True (b) False
15. 15.True or false: icons with no meaning is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Save button: 60 px tall
    Back button: 52 px tall
17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) white on black (d) pale pink on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Help button: 68 px tall
    Cancel button: 48 px tall (a) Cancel (b) Help (c) Send
23. 23.True or false: icons with no meaning is good button design. (a) True (b) False
24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 52 px tall
    Start button: 72 px tall (a) Start (b) Done (c) Cancel
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 40 px tall
    Done button: 52 px tall (a) Done (b) Save (c) Help
28. 28.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) black on yellow
29. 29.True or false: a tiny 20 px button is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
31. 31.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on pale grey (d) light grey on white
32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Save button: 32 px tall
    Send button: 60 px tall
    Back button: 32 px tall
34. 34.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 52 px tall
    Save button: 52 px tall
    Done button: 44 px tall (a) Cancel (b) Save (c) Help (d) Done
36. 36.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
37. 37.True or false: a clear word like Save is poor button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Help button: 36 px tall
    Save button: 64 px tall (a) Save (b) Next (c) Help
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Send button: 48 px tall
    Back button: 68 px tall
    Cancel button: 24 px tall (a) Cancel (b) Back (c) Send (d) Help
40. 40.True or false: buttons almost touching is good button design. (a) True (b) False

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