App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 62 · 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) False (b) True
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) black on yellow (d) white on black
5. 5.True or false: buttons almost touching is poor button design. (a) False (b) True
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 32 px tall
   Done button: 64 px tall
   Next button: 48 px tall
   Cancel button: 48 px tall (a) Cancel (b) Next (c) Save (d) Done
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Save button: 44 px tall
    Help button: 52 px tall (a) Help (b) Save (c) Next
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) pale pink on white (d) light grey on white
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
16. 16.True or false: a tiny 20 px button is good button design. (a) True (b) False
17. 17.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) pale pink on white
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Send button: 52 px tall
    Help button: 72 px tall (a) Help (b) Next (c) Send
21. 21.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: a big, easy tap area is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 32 px tall
    Save button: 48 px tall
    Back button: 52 px tall (a) Cancel (b) Help (c) Back (d) Save
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Help button: 64 px tall
    Start button: 72 px tall (a) Start (b) Help (c) Send
25. 25.True or false: a clear word like Save is poor button design. (a) False (b) True
26. 26.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on black (d) pale pink on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Cancel button: 56 px tall
    Save button: 56 px tall (a) Cancel (b) Send (c) Save
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Start button: 36 px tall
    Done button: 56 px tall
    Help button: 36 px tall
29. 29.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
31. 31.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) yellow on white (d) dark blue on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 48 px tall
    Done button: 60 px tall
    Start button: 60 px tall
33. 33.True or false: space between buttons is poor button design. (a) False (b) True
34. 34.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
35. 35.True or false: grey text on grey is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 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?
    Send button: 40 px tall
    Cancel button: 52 px tall
    Start button: 64 px tall
38. 38.True or false: a tiny 20 px button is poor button design. (a) True (b) False
39. 39.True or false: a clear word like Save is good button design. (a) True (b) False
40. 40.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read

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