App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 398 · 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 white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Start button: 48 px tall
   Send button: 28 px tall
   Back button: 72 px tall (a) Send (b) Back (c) Help (d) Start
5. 5.True or false: grey text on grey is good button design. (a) False (b) True
6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) white on dark green (d) black on pale grey
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 56 px tall
   Save button: 52 px tall
   Back button: 48 px tall
9. 9.True or false: a clear word like Save is poor button design. (a) False (b) True
10. 10.True or false: strong colour contrast is good button design. (a) True (b) False
11. 11.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) black on pale grey
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 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?
    Save button: 40 px tall
    Send button: 72 px tall
    Cancel button: 72 px tall (a) Send (b) Save (c) Cancel
14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Next button: 64 px tall
    Cancel button: 48 px tall
    Send button: 48 px tall (a) Cancel (b) Help (c) Next (d) Send
17. 17.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Help button: 56 px tall
    Cancel button: 32 px tall
    Send button: 36 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 52 px tall
    Next button: 32 px tall (a) Cancel (b) Next (c) Done
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 52 px tall
    Save button: 40 px tall (a) Cancel (b) Send (c) Save
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Cancel button: 32 px tall
    Help button: 64 px tall
    Start button: 64 px tall (a) Start (b) Help (c) Cancel (d) Done
24. 24.True or false: icons with no meaning is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 64 px tall
    Done button: 48 px tall
    Save button: 60 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Start button: 72 px tall
    Done button: 64 px tall (a) Cancel (b) Start (c) Done
27. 27.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) pale pink on white
29. 29.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
31. 31.True or false: strong colour contrast is poor button design. (a) False (b) True
32. 32.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on black (d) white on dark green
33. 33.True or false: a big, easy tap area is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 52 px tall
    Done button: 36 px tall (a) Save (b) Next (c) Done
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Back button: 36 px tall
    Start button: 40 px tall
36. 36.True or false: grey text on grey is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
38. 38.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 52 px tall
    Done button: 28 px tall (a) Done (b) Save (c) Cancel
40. 40.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) red on green

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