App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 415 · 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 pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) white on dark green (d) black on yellow
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Help button: 40 px tall
   Next button: 68 px tall
   Done button: 68 px tall (a) Help (b) Back (c) Done (d) Next
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 68 px tall
   Back button: 36 px tall
   Help button: 52 px tall (a) Back (b) Next (c) Help
6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Start button: 60 px tall
   Send button: 32 px tall
10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Send button: 48 px tall
    Start button: 60 px tall
    Next button: 56 px tall (a) Send (b) Next (c) Back (d) Start
12. 12.True or false: a clear word like Save is good button design. (a) False (b) True
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: icons with no meaning is poor button design. (a) True (b) False
15. 15.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on pale grey (d) dark blue on black
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Save button: 68 px tall
    Back button: 52 px tall (a) Next (b) Save (c) Back
17. 17.True or false: strong colour contrast is good button design. (a) False (b) True
18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Back button: 52 px tall
    Cancel button: 32 px tall
    Save button: 68 px tall (a) Start (b) Save (c) Cancel (d) Back
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 52 px tall
    Send button: 48 px tall
    Save button: 56 px tall
21. 21.True or false: a big, easy tap area is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Help button: 52 px tall
    Save button: 24 px tall
    Done button: 48 px tall (a) Save (b) Done (c) Start (d) Help
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 56 px tall
    Done button: 44 px tall
24. 24.True or false: icons with no meaning is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Back button: 52 px tall
    Done button: 52 px tall (a) Done (b) Save (c) Back
26. 26.True or false: buttons almost touching is poor button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Done button: 48 px tall
    Save button: 40 px tall (a) Cancel (b) Done (c) Save
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 48 px tall
    Help button: 40 px tall
    Cancel button: 36 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Help button: 56 px tall
    Cancel button: 48 px tall (a) Help (b) Cancel (c) Back
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
32. 32.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) yellow on white (d) red on green
33. 33.True or false: a tiny 20 px button is good button design. (a) False (b) True
34. 34.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) white on dark green (d) black on yellow
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 40 px tall
    Cancel button: 48 px tall (a) Cancel (b) Done (c) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
38. 38.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 48 px tall
    Done button: 36 px tall (a) Back (b) Done (c) Save
40. 40.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design

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