App Dev Worksheet: Button Size and Contrast

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

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