App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 298 · 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.True or false: strong colour contrast is poor button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 32 px tall
   Send button: 72 px tall
   Done button: 52 px tall (a) Save (b) Done (c) Send
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 52 px tall
   Cancel button: 60 px tall
   Back button: 64 px tall
   Done button: 28 px tall (a) Save (b) Back (c) Done (d) Cancel
5. 5.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 32 px tall
   Next button: 32 px tall
   Done button: 40 px tall
   Start button: 36 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 56 px tall
   Next button: 36 px tall
   Start button: 56 px tall
9. 9.True or false: icons with no meaning is poor button design. (a) False (b) True
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
11. 11.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) black on yellow (d) white on black
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Help button: 52 px tall
    Save button: 64 px tall
    Done button: 48 px tall (a) Done (b) Help (c) Back (d) Save
14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
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. Which button is too small?
    Next button: 48 px tall
    Back button: 64 px tall
    Cancel button: 32 px tall (a) Next (b) Back (c) Cancel
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on dark green (d) dark blue on black
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Cancel button: 48 px tall
    Save button: 56 px tall
    Help button: 64 px tall (a) Help (b) Cancel (c) Save (d) Done
19. 19.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) black on yellow
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) red on green (d) dark blue on black
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 64 px tall
    Next button: 56 px tall
24. 24.True or false: buttons almost touching is poor button design. (a) False (b) True
25. 25.True or false: grey text on grey is poor button design. (a) False (b) True
26. 26.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
27. 27.True or false: a tiny 20 px button is good button design. (a) True (b) False
28. 28.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) dark blue on black (d) white on dark green
29. 29.🌗 Is dark blue on white 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. Which button is too small?
    Done button: 24 px tall
    Save button: 56 px tall
    Next button: 68 px tall (a) Done (b) Next (c) Save
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Back button: 44 px tall
    Start button: 48 px tall (a) Back (b) Done (c) Start
32. 32.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) dark blue on black (d) yellow on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
35. 35.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) dark blue on white (d) white on black
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Save button: 56 px tall
    Next button: 40 px tall
    Back button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Back button: 32 px tall
    Save button: 56 px tall (a) Save (b) Help (c) Back

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