App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 604 · 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) light grey on white (c) dark blue on black (d) black on pale grey
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.True or false: a tiny 20 px button is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 48 px tall
   Back button: 48 px tall
   Start button: 56 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Help button: 56 px tall
   Save button: 36 px tall
   Start button: 64 px tall
6. 6.True or false: strong colour contrast is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 64 px tall
   Cancel button: 56 px tall
   Save button: 48 px tall
   Send button: 32 px tall (a) Start (b) Cancel (c) Send (d) Save
10. 10.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 48 px tall
    Cancel button: 44 px tall
    Send button: 32 px tall
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.True or false: icons with no meaning is good button design. (a) False (b) True
16. 16.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
18. 18.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Help button: 36 px tall
    Next button: 48 px tall
    Start button: 60 px tall
21. 21.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) yellow on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Start button: 44 px tall
    Done button: 36 px tall
    Next button: 56 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 48 px tall
    Done button: 56 px tall
    Next button: 48 px tall (a) Save (b) Next (c) Done (d) Help
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 48 px tall
    Next button: 32 px tall
    Back button: 48 px tall (a) Back (b) Next (c) Start (d) Cancel
25. 25.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Save button: 68 px tall
    Start button: 32 px tall (a) Back (b) Save (c) Start
27. 27.True or false: a big, easy tap area is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
29. 29.True or false: a clear word like Save is good button design. (a) False (b) True
30. 30.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) white on dark green
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Cancel button: 24 px tall
    Next button: 52 px tall
    Back button: 56 px tall (a) Next (b) Cancel (c) Help (d) Back
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
33. 33.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
35. 35.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) yellow on white (d) red on green
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 52 px tall
    Done button: 24 px tall (a) Save (b) Help (c) Done
37. 37.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 64 px tall
    Start button: 40 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 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?
    Save button: 48 px tall
    Start button: 64 px tall
    Done button: 24 px tall
    Back button: 52 px tall (a) Save (b) Back (c) Done (d) Start

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