App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 76 · 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 yellow easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 36 px tall
   Next button: 60 px tall
   Cancel button: 68 px tall (a) Cancel (b) Done (c) Next
4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) light grey on white (d) white on dark green
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 56 px tall
   Done button: 48 px tall
   Help button: 64 px tall
   Save button: 28 px tall (a) Help (b) Done (c) Cancel (d) Save
7. 7.True or false: buttons almost touching is poor button design. (a) False (b) True
8. 8.True or false: a clear word like Save is poor button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 64 px tall
   Cancel button: 64 px tall
   Next button: 44 px tall
10. 10.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) yellow on white (d) black on yellow
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 68 px tall
    Send button: 56 px tall (a) Help (b) Send (c) Cancel
12. 12.True or false: strong colour contrast is poor button design. (a) True (b) False
13. 13.True or false: a clear word like Save is good button design. (a) False (b) True
14. 14.True or false: buttons almost touching is good button design. (a) False (b) True
15. 15.🌗 Is black on pale grey 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. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 52 px tall
    Done button: 60 px tall
17. 17.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) white on dark green
18. 18.🔘 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
    Next button: 32 px tall
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.True or false: a big, easy tap area is poor button design. (a) False (b) True
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 52 px tall
    Back button: 28 px tall (a) Back (b) Send (c) Next
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 64 px tall
    Next button: 60 px tall (a) Save (b) Cancel (c) Next
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Back button: 48 px tall
    Done button: 28 px tall (a) Done (b) Cancel (c) Back
26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
28. 28.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) dark blue on white (d) white on black
29. 29.True or false: space between buttons is poor button design. (a) True (b) False
30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Send button: 48 px tall
    Cancel button: 60 px tall (a) Send (b) Next (c) Cancel
32. 32.🌗 Is yellow on white 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. The Start button is 36 px tall. How many px taller must it be?
34. 34.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.True or false: a tiny 20 px button is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 48 px tall
    Save button: 36 px tall
    Next button: 32 px tall
38. 38.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design

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