App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 367 · 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?
   Help button: 56 px tall
   Done button: 72 px tall
   Back button: 32 px tall (a) Back (b) Help (c) Done
2. 2.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) white on dark green
3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: a clear word like Save is good button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
8. 8.True or false: icons with no meaning is good button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 40 px tall
   Done button: 36 px tall
   Next button: 60 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Start button: 64 px tall
    Done button: 68 px tall (a) Done (b) Start (c) Cancel
11. 11.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
12. 12.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) red on green (d) white on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
14. 14.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on pale grey (d) red on green
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 28 px tall
    Help button: 52 px tall
    Done button: 52 px tall (a) Help (b) Back (c) Start (d) Done
16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.True or false: a tiny 20 px button is poor button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Cancel button: 56 px tall
    Back button: 36 px tall (a) Next (b) Cancel (c) Back
19. 19.True or false: a big, easy tap area is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
21. 21.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Back button: 40 px tall
    Cancel button: 32 px tall
23. 23.True or false: buttons almost touching is poor button design. (a) True (b) False
24. 24.True or false: space between buttons is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Save button: 52 px tall
    Next button: 60 px tall
27. 27.🌗 Is light grey 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. How many of these buttons follow the rule?
    Done button: 44 px tall
    Next button: 52 px tall
    Save button: 60 px tall
    Help button: 36 px tall
29. 29.True or false: strong colour contrast is good button design. (a) False (b) True
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Save button: 52 px tall
    Start button: 68 px tall
    Done button: 64 px tall (a) Start (b) Done (c) Save (d) Back
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Help button: 60 px tall
    Back button: 48 px tall (a) Cancel (b) Help (c) Back
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Cancel button: 48 px tall
    Send button: 56 px tall
    Back button: 72 px tall (a) Done (b) Back (c) Cancel (d) Send
34. 34.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) yellow on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Send button: 64 px tall
    Next button: 68 px tall
    Save button: 68 px tall (a) Save (b) Start (c) Send (d) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
37. 37.True or false: a tiny 20 px button is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 36 px tall
    Send button: 52 px tall (a) Send (b) Help (c) Start
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) pale pink on white (d) black on yellow

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