App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 441 · 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) good design (b) poor design
2. 2.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Save button: 32 px tall
   Done button: 36 px tall
4. 4.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) red on green (d) dark blue on black
5. 5.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 56 px tall
   Save button: 44 px tall
   Start button: 32 px tall
   Help button: 48 px tall
7. 7.True or false: buttons almost touching is poor button design. (a) True (b) False
8. 8.Which colour pair is hard to read? (a) red on green (b) white on black (c) white on dark green (d) dark blue on white
9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on dark green (d) yellow on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
16. 16.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) red on green (d) light grey on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Help button: 40 px tall
    Send button: 64 px tall
    Start button: 48 px tall
19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 44 px tall
    Done button: 48 px tall (a) Save (b) Cancel (c) Done
22. 22.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Next button: 56 px tall
    Start button: 40 px tall (a) Start (b) Send (c) Next
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Send button: 44 px tall
    Save button: 56 px tall (a) Send (b) Next (c) Save
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Help button: 60 px tall
    Back button: 40 px tall
    Save button: 32 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 64 px tall
    Cancel button: 32 px tall
    Save button: 56 px tall (a) Save (b) Back (c) Cancel (d) Next
29. 29.True or false: icons with no meaning is good button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 60 px tall
    Cancel button: 56 px tall
    Help button: 40 px tall
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Back button: 56 px tall
    Send button: 32 px tall (a) Send (b) Cancel (c) Back
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 40 px tall
    Start button: 36 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Start button: 48 px tall
    Back button: 40 px tall
    Send button: 48 px tall (a) Send (b) Start (c) Back (d) Cancel
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 28 px tall
    Help button: 52 px tall
    Next button: 48 px tall (a) Next (b) Send (c) Cancel (d) Help
37. 37.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
38. 38.True or false: a big, easy tap area is poor button design. (a) True (b) False
39. 39.True or false: icons with no meaning is poor button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?

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