App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 351 · 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. How many of these buttons follow the rule?
   Cancel button: 48 px tall
   Start button: 36 px tall
   Send button: 56 px tall
2. 2.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) dark blue on white (d) red on green
3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
4. 4.True or false: icons with no meaning is good button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 32 px tall
   Back button: 56 px tall
   Cancel button: 60 px tall (a) Back (b) Save (c) Cancel
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 64 px tall
   Cancel button: 64 px tall
   Save button: 36 px tall
   Next button: 32 px tall
7. 7.True or false: icons with no meaning is poor button design. (a) False (b) True
8. 8.True or false: grey text on grey is good button design. (a) True (b) False
9. 9.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on black (d) white on dark green
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 44 px tall
    Done button: 60 px tall
    Back button: 36 px tall
11. 11.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Cancel button: 48 px tall
    Start button: 48 px tall
    Save button: 28 px tall (a) Save (b) Cancel (c) Start (d) Back
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 60 px tall
    Back button: 56 px tall (a) Back (b) Done (c) Cancel
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Start button: 60 px tall
    Cancel button: 48 px tall (a) Cancel (b) Done (c) Start
17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 48 px tall
    Help button: 40 px tall (a) Back (b) Next (c) Help
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Save button: 32 px tall
    Start button: 64 px tall (a) Save (b) Next (c) Start
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 24 px tall
    Send button: 48 px tall
    Next button: 68 px tall (a) Send (b) Next (c) Save (d) Done
22. 22.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on black (d) white on dark green
23. 23.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) light grey on white (d) dark blue on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Start button: 32 px tall
    Cancel button: 72 px tall (a) Cancel (b) Start (c) Help
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
27. 27.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 36 px tall
    Cancel button: 32 px tall
29. 29.True or false: strong colour contrast is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 52 px tall
    Send button: 56 px tall
31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.True or false: a clear word like Save is poor button design. (a) False (b) True
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.Which colour pair is hard to read? (a) red on green (b) white on black (c) black on pale grey (d) white on dark green
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Send button: 24 px tall
    Next button: 56 px tall (a) Next (b) Help (c) Send
37. 37.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) yellow on white (d) white on dark green
38. 38.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
39. 39.True or false: space between buttons is good button design. (a) False (b) True
40. 40.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design

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