App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 672 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 72 px tall
   Back button: 36 px tall
   Done button: 60 px tall
   Save button: 68 px tall (a) Done (b) Back (c) Save (d) Next
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) white on black
4. 4.True or false: a clear word like Save is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 48 px tall
   Done button: 52 px tall
   Save button: 40 px tall
   Back button: 44 px tall
6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
7. 7.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.True or false: a big, easy tap area is poor button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 56 px tall
   Cancel button: 60 px tall
   Help button: 60 px tall
   Back button: 28 px tall (a) Help (b) Cancel (c) Back (d) Start
10. 10.True or false: strong colour contrast is poor button design. (a) False (b) True
11. 11.True or false: a tiny 20 px button is poor button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on dark green (d) black on yellow
13. 13.True or false: icons with no meaning is good button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Done button: 56 px tall
    Save button: 44 px tall
    Send button: 60 px tall (a) Done (b) Back (c) Send (d) Save
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 60 px tall
    Help button: 36 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 52 px tall
    Start button: 40 px tall
17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) white on dark green (d) black on yellow
19. 19.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) black on pale grey (d) red on green
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Start button: 40 px tall
    Next button: 48 px tall
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?
    Next button: 24 px tall
    Help button: 60 px tall
    Done button: 52 px tall (a) Help (b) Done (c) Next
23. 23.True or false: strong colour contrast is good button design. (a) False (b) True
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
26. 26.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
27. 27.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Help button: 68 px tall
    Next button: 48 px tall
    Back button: 28 px tall (a) Help (b) Back (c) Start (d) Next
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Start button: 72 px tall
    Help button: 48 px tall (a) Help (b) Start (c) Back
30. 30.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 44 px tall
    Done button: 36 px tall
34. 34.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) dark blue on white (d) white on black
35. 35.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) red on green (d) dark blue on black
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
37. 37.True or false: a clear word like Save is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Back button: 36 px tall
    Done button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

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